FOMC Service Report

16S rRNA Gene V1V3 Amplicon Sequencing

Version V1.52

Version History

The Forsyth Institute, Cambridge, MA, USA
June 21, 2026

Project ID: 20260618_CLIFF


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I. Project Summary

Project 20260618_CLIFF services include NGS sequencing of the V1V3 region of the 16S rRNA gene amplicons from the samples. First and foremost, please download this report, as well as the sequence raw data from the download links provided below. These links will expire after 60 days. We cannot guarantee the availability of your data after 60 days.

Full Bioinformatics analysis service was requested. We provide many analyses, starting from the raw sequence quality and noise filtering, pair reads merging, as well as chimera filtering for the sequences, using the DADA2 denosing algorithm and pipeline.

We also provide many downstream analyses such as taxonomy assignment, alpha and beta diversity analyses, and differential abundance analysis.

For taxonomy assignment, most informative would be the taxonomy barplots. We provide an interactive barplots to show the relative abundance of microbes at different taxonomy levels (from Phylum to species) that you can choose.

If you specify which groups of samples you want to compare for differential abundance, we provide both ANCOM and LEfSe differential abundance analysis.

 

II. Workflow Checklist

1.Sample Received
2.Sample Quality Evaluated
3.Sample Prepared for Sequencing
4.Next-Gen Sequencing
5.Sequence Quality Check
6.Absolute Abundance
7.Report and Raw Sequence Data Available for Download
8.Bioinformatics Analysis - Reads Processing (DADA2 Quality Trimming, Denoising, Paired Reads Merging)
9.Bioinformatics Analysis - Reads Taxonomy Assignment
10.Bioinformatics Analysis - Alpha Diversity Analysis
11.Bioinformatics Analysis - Beta Diversity Analysis
12.Bioinformatics Analysis - Differential Abundance Analysis
13.Bioinformatics Analysis - Heatmap Profile
14.Bioinformatics Analysis - Network Association
 

III. NGS Sequencing

The samples were processed and analyzed with the ZymoBIOMICS® Service: Targeted Metagenomic Sequencing (Zymo Research, Irvine, CA).

DNA Extraction: If DNA extraction was performed, the following DNA extraction kit was used according to the manufacturer’s instructions:

ZymoBIOMICS®-96 MagBead DNA Kit (Zymo Research, Irvine, CA)
N/A (DNA Extraction Not Performed)
Elution Volume: 50µL
Additional Notes: NA

Targeted Library Preparation: The DNA samples were prepared for targeted sequencing with the Quick-16S™ NGS Library Prep Kit (Zymo Research, Irvine, CA). These primers were custom designed by Zymo Research to provide the best coverage of the 16S gene while maintaining high sensitivity. The primer sets used in this project are marked below:

Quick-16S™ Primer Set V1-V2 (Zymo Research, Irvine, CA)
Quick-16S™ Primer Set V1-V3 (Zymo Research, Irvine, CA)
Quick-16S™ Primer Set V3-V4 (Zymo Research, Irvine, CA)
Quick-16S™ Primer Set V4 (Zymo Research, Irvine, CA)
Quick-16S™ Primer Set V6-V8 (Zymo Research, Irvine, CA)
Additional Notes: NA

The sequencing library was prepared using an innovative library preparation process in which PCR reactions were performed in real-time PCR machines to control cycles and therefore limit PCR chimera formation. The final PCR products were quantified with qPCR fluorescence readings and pooled together based on equal molarity. The final pooled library was cleaned up with the Select-a-Size DNA Clean & Concentrator™ (Zymo Research, Irvine, CA), then quantified with TapeStation® (Agilent Technologies, Santa Clara, CA) and Qubit® (Thermo Fisher Scientific, Waltham, WA).

Control Samples: The ZymoBIOMICS® Microbial Community Standard (Zymo Research, Irvine, CA) was used as a positive control for each DNA extraction, if performed. The ZymoBIOMICS® Microbial Community DNA Standard (Zymo Research, Irvine, CA) was used as a positive control for each targeted library preparation. Negative controls (i.e. blank extraction control, blank library preparation control) were included to assess the level of bioburden carried by the wet-lab process.

Sequencing: The final library was sequenced on Illumina® NextSeq 2000™ with a p1 (Illumina, Sand Diego, CA) reagent kit (600 cycles). The sequencing was performed with 25% PhiX spike-in.

Absolute Abundance Quantification*: A quantitative real-time PCR was set up with a standard curve. The standard curve was made with plasmid DNA containing one copy of the 16S gene and one copy of the fungal ITS2 region prepared in 10-fold serial dilutions. The primers used were the same as those used in Targeted Library Preparation. The equation generated by the plasmid DNA standard curve was used to calculate the number of gene copies in the reaction for each sample. The PCR input volume (2 µl) was used to calculate the number of gene copies per microliter in each DNA sample.
The number of genome copies per microliter DNA sample was calculated by dividing the gene copy number by an assumed number of gene copies per genome. The value used for 16S copies per genome is 4. The value used for ITS copies per genome is 200. The amount of DNA per microliter DNA sample was calculated using an assumed genome size of 4.64 x 106 bp, the genome size of Escherichia coli, for 16S samples, or an assumed genome size of 1.20 x 107 bp, the genome size of Saccharomyces cerevisiae, for ITS samples. This calculation is shown below:

Calculated Total DNA = Calculated Total Genome Copies × Assumed Genome Size (4.64 × 106 bp) ×
Average Molecular Weight of a DNA bp (660 g/mole/bp) ÷ Avogadro’s Number (6.022 x 1023/mole)


* Absolute Abundance Quantification is only available for 16S and ITS analyses.

The absolute abundance standard curve data can be viewed in Excel here:

The absolute abundance standard curve is shown below:

Absolute Abundance Standard Curve

 

IV. Complete Report Download

The complete report of your project, including all links in this report, can be downloaded by clicking the link provided below. The downloaded file is a compressed ZIP file and once unzipped, open the file “REPORT.html” (may only shown as "REPORT" in your computer) by double clicking it. Your default web browser will open it and you will see the exact content of this report.

Please download and save the file to your computer storage device. The download link will expire after 60 days upon your receiving of this report.

Complete report download link:

To view the report, please follow the following steps:

1.Download the .zip file from the report link above.
2.Extract all the contents of the downloaded .zip file to your desktop.
3.Open the extracted folder and find the "REPORT.html" (may shown as only "REPORT").
4.Open (double-clicking) the REPORT.html file. Your default browser will open the top age of the complete report. Within the report, there are links to view all the analyses performed for the project.

 

V. Raw Sequence Data Download

The raw NGS sequence data is available for download with the link provided below. The data is a compressed ZIP file and can be unzipped to individual sequence files. Since this is a Pac-Bio full-length (V1V9) 16S rRNA amplicon sequencing, raw sequences are available for download in a single compressed zip file in the download link below. After unzipping, you will find individual sequence files for each of your samples with the file extension “*.fastq.gz”. The files are in FASTQ format and are compressed. FASTQ format is a text-based data format for storing both a biological sequence and its corresponding quality scores. Most sequence analysis software will be able to open them. The Sample IDs associated with the fastq files are listed in the table below:

Sample IDOriginal Sample IDRead 1 File NameRead 2 File Name
F73312.S01fastq_ori/ERR12711800_1.fastqfastq_ori/ERR12711800_2.fastq
F73312.S02fastq_ori/ERR12711803_1.fastqfastq_ori/ERR12711803_2.fastq
F73312.S03fastq_ori/ERR12711807_1.fastqfastq_ori/ERR12711807_2.fastq
F73312.S04fastq_ori/ERR12711813_1.fastqfastq_ori/ERR12711813_2.fastq
F73312.S05fastq_ori/ERR12711900_1.fastqfastq_ori/ERR12711900_2.fastq
F73312.S06fastq_ori/ERR12711905_1.fastqfastq_ori/ERR12711905_2.fastq
F73312.S07fastq_ori/ERR12712136_1.fastqfastq_ori/ERR12712136_2.fastq
F73312.S08fastq_ori/ERR12712138_1.fastqfastq_ori/ERR12712138_2.fastq
F73312.S09fastq_ori/ERR12712141_1.fastqfastq_ori/ERR12712141_2.fastq
F73312.S10fastq_ori/ERR12712145_1.fastqfastq_ori/ERR12712145_2.fastq
F73312.S11fastq_ori/ERR12712151_1.fastqfastq_ori/ERR12712151_2.fastq
F73312.S12fastq_ori/ERR12712157_1.fastqfastq_ori/ERR12712157_2.fastq
F73312.S13fastq_ori/ERR12712160_1.fastqfastq_ori/ERR12712160_2.fastq
F73312.S14fastq_ori/ERR12712164_1.fastqfastq_ori/ERR12712164_2.fastq
F73312.S15fastq_ori/ERR12712167_1.fastqfastq_ori/ERR12712167_2.fastq
F73312.S16fastq_ori/ERR12712183_1.fastqfastq_ori/ERR12712183_2.fastq
F73312.S17fastq_ori/ERR12712184_1.fastqfastq_ori/ERR12712184_2.fastq
F73312.S18fastq_ori/ERR12712190_1.fastqfastq_ori/ERR12712190_2.fastq
F73312.S19fastq_ori/ERR12712191_1.fastqfastq_ori/ERR12712191_2.fastq
F73312.S20fastq_ori/ERR12712192_1.fastqfastq_ori/ERR12712192_2.fastq
F73312.S21fastq_ori/ERR12712193_1.fastqfastq_ori/ERR12712193_2.fastq
F73312.S22fastq_ori/ERR12712194_1.fastqfastq_ori/ERR12712194_2.fastq
F73312.S23fastq_ori/ERR12712195_1.fastqfastq_ori/ERR12712195_2.fastq
F73312.S24fastq_ori/ERR12712196_1.fastqfastq_ori/ERR12712196_2.fastq
F73312.S25fastq_ori/ERR12712197_1.fastqfastq_ori/ERR12712197_2.fastq
F73312.S26fastq_ori/ERR12712198_1.fastqfastq_ori/ERR12712198_2.fastq
F73312.S27fastq_ori/ERR12712199_1.fastqfastq_ori/ERR12712199_2.fastq
F73312.S28fastq_ori/ERR12712200_1.fastqfastq_ori/ERR12712200_2.fastq
F73312.S29fastq_ori/ERR12712201_1.fastqfastq_ori/ERR12712201_2.fastq
F73312.S30fastq_ori/ERR12712202_1.fastqfastq_ori/ERR12712202_2.fastq
F73312.S31fastq_ori/ERR12712203_1.fastqfastq_ori/ERR12712203_2.fastq
F73312.S32fastq_ori/ERR12712204_1.fastqfastq_ori/ERR12712204_2.fastq
F73312.S33fastq_ori/ERR12712205_1.fastqfastq_ori/ERR12712205_2.fastq
F73312.S34fastq_ori/ERR12712206_1.fastqfastq_ori/ERR12712206_2.fastq
F73312.S35fastq_ori/ERR12712207_1.fastqfastq_ori/ERR12712207_2.fastq
F73312.S36fastq_ori/ERR12712208_1.fastqfastq_ori/ERR12712208_2.fastq
F73312.S37fastq_ori/ERR12712209_1.fastqfastq_ori/ERR12712209_2.fastq
F73312.S38fastq_ori/ERR12712210_1.fastqfastq_ori/ERR12712210_2.fastq
F73312.S39fastq_ori/ERR12712211_1.fastqfastq_ori/ERR12712211_2.fastq
F73312.S40fastq_ori/ERR12712212_1.fastqfastq_ori/ERR12712212_2.fastq
F73312.S41fastq_ori/ERR12712213_1.fastqfastq_ori/ERR12712213_2.fastq
F73312.S42fastq_ori/ERR12712214_1.fastqfastq_ori/ERR12712214_2.fastq
F73312.S43fastq_ori/ERR12712215_1.fastqfastq_ori/ERR12712215_2.fastq
F73312.S44fastq_ori/ERR12712216_1.fastqfastq_ori/ERR12712216_2.fastq
F73312.S45fastq_ori/ERR12712217_1.fastqfastq_ori/ERR12712217_2.fastq
F73312.S46fastq_ori/ERR12712218_1.fastqfastq_ori/ERR12712218_2.fastq
F73312.S47fastq_ori/ERR12712219_1.fastqfastq_ori/ERR12712219_2.fastq
F73312.S48fastq_ori/ERR12712220_1.fastqfastq_ori/ERR12712220_2.fastq
F73312.S49fastq_ori/ERR12712221_1.fastqfastq_ori/ERR12712221_2.fastq
F73312.S50fastq_ori/ERR12712222_1.fastqfastq_ori/ERR12712222_2.fastq
F73312.S51fastq_ori/ERR12712223_1.fastqfastq_ori/ERR12712223_2.fastq
F73312.S52fastq_ori/ERR12712224_1.fastqfastq_ori/ERR12712224_2.fastq
F73312.S53fastq_ori/ERR12712225_1.fastqfastq_ori/ERR12712225_2.fastq
F73312.S54fastq_ori/ERR12712226_1.fastqfastq_ori/ERR12712226_2.fastq
F73312.S55fastq_ori/ERR12712227_1.fastqfastq_ori/ERR12712227_2.fastq
F73312.S56fastq_ori/ERR12712228_1.fastqfastq_ori/ERR12712228_2.fastq
F73312.S57fastq_ori/ERR12712229_1.fastqfastq_ori/ERR12712229_2.fastq
F73312.S58fastq_ori/ERR12712230_1.fastqfastq_ori/ERR12712230_2.fastq
F73312.S59fastq_ori/ERR12712231_1.fastqfastq_ori/ERR12712231_2.fastq
F73312.S60fastq_ori/ERR12712232_1.fastqfastq_ori/ERR12712232_2.fastq
F73312.S61fastq_ori/ERR12712233_1.fastqfastq_ori/ERR12712233_2.fastq
F73312.S62fastq_ori/ERR12712234_1.fastqfastq_ori/ERR12712234_2.fastq
F73312.S63fastq_ori/ERR12712235_1.fastqfastq_ori/ERR12712235_2.fastq
F73312.S64fastq_ori/ERR12712236_1.fastqfastq_ori/ERR12712236_2.fastq
F73312.S65fastq_ori/ERR12712237_1.fastqfastq_ori/ERR12712237_2.fastq
F73312.S66fastq_ori/ERR12712238_1.fastqfastq_ori/ERR12712238_2.fastq
F73312.S67fastq_ori/ERR12712239_1.fastqfastq_ori/ERR12712239_2.fastq
F73312.S68fastq_ori/ERR12712240_1.fastqfastq_ori/ERR12712240_2.fastq
F73312.S69fastq_ori/ERR12712241_1.fastqfastq_ori/ERR12712241_2.fastq
F73312.S70fastq_ori/ERR12712242_1.fastqfastq_ori/ERR12712242_2.fastq
F73312.S71fastq_ori/ERR12712243_1.fastqfastq_ori/ERR12712243_2.fastq
F73312.S72fastq_ori/ERR12712244_1.fastqfastq_ori/ERR12712244_2.fastq
F73312.S73fastq_ori/ERR12712245_1.fastqfastq_ori/ERR12712245_2.fastq
F73312.S74fastq_ori/ERR12712246_1.fastqfastq_ori/ERR12712246_2.fastq
F73312.S75fastq_ori/ERR12712247_1.fastqfastq_ori/ERR12712247_2.fastq
F73312.S76fastq_ori/ERR12712248_1.fastqfastq_ori/ERR12712248_2.fastq
F73312.S77fastq_ori/ERR12712249_1.fastqfastq_ori/ERR12712249_2.fastq
F73312.S78fastq_ori/ERR12712250_1.fastqfastq_ori/ERR12712250_2.fastq
F73312.S79fastq_ori/ERR12712251_1.fastqfastq_ori/ERR12712251_2.fastq
F73312.S80fastq_ori/ERR12712252_1.fastqfastq_ori/ERR12712252_2.fastq
F73312.S81fastq_ori/ERR12712253_1.fastqfastq_ori/ERR12712253_2.fastq
F73312.S82fastq_ori/ERR12712254_1.fastqfastq_ori/ERR12712254_2.fastq
F73312.S83fastq_ori/ERR12712255_1.fastqfastq_ori/ERR12712255_2.fastq
F73312.S84fastq_ori/ERR12712256_1.fastqfastq_ori/ERR12712256_2.fastq
F73312.S85fastq_ori/ERR12712257_1.fastqfastq_ori/ERR12712257_2.fastq
F73312.S86fastq_ori/ERR12712258_1.fastqfastq_ori/ERR12712258_2.fastq
F73312.S87fastq_ori/ERR12712259_1.fastqfastq_ori/ERR12712259_2.fastq
F1043432.S01fastq_ori/SRR26896019_1.fastqfastq_ori/SRR26896019_2.fastq
F1043432.S02fastq_ori/SRR26896030_1.fastqfastq_ori/SRR26896030_2.fastq
F1043432.S03fastq_ori/SRR26896041_1.fastqfastq_ori/SRR26896041_2.fastq
F1043432.S04fastq_ori/SRR26896052_1.fastqfastq_ori/SRR26896052_2.fastq
F1043432.S05fastq_ori/SRR26896054_1.fastqfastq_ori/SRR26896054_2.fastq
F1043432.S06fastq_ori/SRR26896055_1.fastqfastq_ori/SRR26896055_2.fastq
F1043432.S07fastq_ori/SRR26896056_1.fastqfastq_ori/SRR26896056_2.fastq
F1043432.S08fastq_ori/SRR26896057_1.fastqfastq_ori/SRR26896057_2.fastq
F1043432.S09fastq_ori/SRR26896058_1.fastqfastq_ori/SRR26896058_2.fastq
F1043432.S10fastq_ori/SRR26896059_1.fastqfastq_ori/SRR26896059_2.fastq
F1043432.S11fastq_ori/SRR26896060_1.fastqfastq_ori/SRR26896060_2.fastq
F1043432.S12fastq_ori/SRR26896061_1.fastqfastq_ori/SRR26896061_2.fastq
F1043432.S13fastq_ori/SRR26896062_1.fastqfastq_ori/SRR26896062_2.fastq
F1043432.S14fastq_ori/SRR26896063_1.fastqfastq_ori/SRR26896063_2.fastq
F1043432.S15fastq_ori/SRR26896064_1.fastqfastq_ori/SRR26896064_2.fastq
F1043432.S16fastq_ori/SRR26896065_1.fastqfastq_ori/SRR26896065_2.fastq
F1043432.S17fastq_ori/SRR26896066_1.fastqfastq_ori/SRR26896066_2.fastq
F1043432.S18fastq_ori/SRR26896067_1.fastqfastq_ori/SRR26896067_2.fastq
F1043432.S19fastq_ori/SRR26896068_1.fastqfastq_ori/SRR26896068_2.fastq
F1043432.S20fastq_ori/SRR26896069_1.fastqfastq_ori/SRR26896069_2.fastq
F1043432.S21fastq_ori/SRR26896070_1.fastqfastq_ori/SRR26896070_2.fastq
F1043432.S22fastq_ori/SRR26896071_1.fastqfastq_ori/SRR26896071_2.fastq
F1043432.S23fastq_ori/SRR26896072_1.fastqfastq_ori/SRR26896072_2.fastq
F1043432.S24fastq_ori/SRR26896073_1.fastqfastq_ori/SRR26896073_2.fastq
F1043432.S25fastq_ori/SRR26896074_1.fastqfastq_ori/SRR26896074_2.fastq
F1043432.S26fastq_ori/SRR26896075_1.fastqfastq_ori/SRR26896075_2.fastq
F1043432.S27fastq_ori/SRR26896076_1.fastqfastq_ori/SRR26896076_2.fastq
F1043432.S28fastq_ori/SRR26896077_1.fastqfastq_ori/SRR26896077_2.fastq
F1043432.S29fastq_ori/SRR26896078_1.fastqfastq_ori/SRR26896078_2.fastq
F1043432.S30fastq_ori/SRR26896079_1.fastqfastq_ori/SRR26896079_2.fastq
F1043432.S31fastq_ori/SRR26896080_1.fastqfastq_ori/SRR26896080_2.fastq
F1043432.S32fastq_ori/SRR26896081_1.fastqfastq_ori/SRR26896081_2.fastq
F1043432.S33fastq_ori/SRR26896082_1.fastqfastq_ori/SRR26896082_2.fastq
F1043432.S34fastq_ori/SRR26896083_1.fastqfastq_ori/SRR26896083_2.fastq
F1043432.S35fastq_ori/SRR26896084_1.fastqfastq_ori/SRR26896084_2.fastq
F1043432.S36fastq_ori/SRR26896085_1.fastqfastq_ori/SRR26896085_2.fastq
F1043432.S37fastq_ori/SRR26896086_1.fastqfastq_ori/SRR26896086_2.fastq
F1043432.S38fastq_ori/SRR26896087_1.fastqfastq_ori/SRR26896087_2.fastq
F1043432.S39fastq_ori/SRR26896088_1.fastqfastq_ori/SRR26896088_2.fastq
F1043432.S40fastq_ori/SRR26896089_1.fastqfastq_ori/SRR26896089_2.fastq
F1043432.S41fastq_ori/SRR26896090_1.fastqfastq_ori/SRR26896090_2.fastq
F1043432.S42fastq_ori/SRR26896091_1.fastqfastq_ori/SRR26896091_2.fastq
F1043432.S43fastq_ori/SRR26896092_1.fastqfastq_ori/SRR26896092_2.fastq
F1043432.S44fastq_ori/SRR26896093_1.fastqfastq_ori/SRR26896093_2.fastq
F1043432.S45fastq_ori/SRR26896094_1.fastqfastq_ori/SRR26896094_2.fastq
F1043432.S46fastq_ori/SRR26896095_1.fastqfastq_ori/SRR26896095_2.fastq
F1043432.S47fastq_ori/SRR26896096_1.fastqfastq_ori/SRR26896096_2.fastq
F1043432.S48fastq_ori/SRR26896097_1.fastqfastq_ori/SRR26896097_2.fastq
F1043432.S49fastq_ori/SRR26896098_1.fastqfastq_ori/SRR26896098_2.fastq
F1043432.S50fastq_ori/SRR26896099_1.fastqfastq_ori/SRR26896099_2.fastq
F1043432.S51fastq_ori/SRR26896100_1.fastqfastq_ori/SRR26896100_2.fastq
F1043432.S52fastq_ori/SRR26896101_1.fastqfastq_ori/SRR26896101_2.fastq
F1043432.S53fastq_ori/SRR26896102_1.fastqfastq_ori/SRR26896102_2.fastq
F1043432.S54fastq_ori/SRR26896103_1.fastqfastq_ori/SRR26896103_2.fastq
F1043432.S55fastq_ori/SRR26896104_1.fastqfastq_ori/SRR26896104_2.fastq
F1043432.S56fastq_ori/SRR26896105_1.fastqfastq_ori/SRR26896105_2.fastq
F1043432.S57fastq_ori/SRR26896106_1.fastqfastq_ori/SRR26896106_2.fastq
F1043432.S58fastq_ori/SRR26896107_1.fastqfastq_ori/SRR26896107_2.fastq
F1043432.S59fastq_ori/SRR26896108_1.fastqfastq_ori/SRR26896108_2.fastq
F1049117.S01fastq_ori/SRR27100551_1.fastqfastq_ori/SRR27100551_2.fastq
F1049117.S02fastq_ori/SRR27100552_1.fastqfastq_ori/SRR27100552_2.fastq
F1049117.S03fastq_ori/SRR27100553_1.fastqfastq_ori/SRR27100553_2.fastq
F1049117.S04fastq_ori/SRR27100554_1.fastqfastq_ori/SRR27100554_2.fastq
F1049117.S05fastq_ori/SRR27100555_1.fastqfastq_ori/SRR27100555_2.fastq
F1049117.S06fastq_ori/SRR27100556_1.fastqfastq_ori/SRR27100556_2.fastq
F1049117.S07fastq_ori/SRR27100557_1.fastqfastq_ori/SRR27100557_2.fastq
F1049117.S08fastq_ori/SRR27100558_1.fastqfastq_ori/SRR27100558_2.fastq
F1049117.S09fastq_ori/SRR27100559_1.fastqfastq_ori/SRR27100559_2.fastq
F1049117.S10fastq_ori/SRR27100560_1.fastqfastq_ori/SRR27100560_2.fastq
F1049117.S11fastq_ori/SRR27100561_1.fastqfastq_ori/SRR27100561_2.fastq
F1049117.S12fastq_ori/SRR27100562_1.fastqfastq_ori/SRR27100562_2.fastq
F1049117.S13fastq_ori/SRR27100563_1.fastqfastq_ori/SRR27100563_2.fastq
F1049117.S14fastq_ori/SRR27100564_1.fastqfastq_ori/SRR27100564_2.fastq
F1049117.S15fastq_ori/SRR27100565_1.fastqfastq_ori/SRR27100565_2.fastq
F1049117.S16fastq_ori/SRR27100566_1.fastqfastq_ori/SRR27100566_2.fastq
F1049117.S17fastq_ori/SRR27100567_1.fastqfastq_ori/SRR27100567_2.fastq
F1049117.S18fastq_ori/SRR27100568_1.fastqfastq_ori/SRR27100568_2.fastq
F1049117.S19fastq_ori/SRR27100569_1.fastqfastq_ori/SRR27100569_2.fastq
F1049117.S20fastq_ori/SRR27100570_1.fastqfastq_ori/SRR27100570_2.fastq
F1049117.S21fastq_ori/SRR27100571_1.fastqfastq_ori/SRR27100571_2.fastq
F1049117.S22fastq_ori/SRR27100572_1.fastqfastq_ori/SRR27100572_2.fastq
F1049117.S23fastq_ori/SRR27100573_1.fastqfastq_ori/SRR27100573_2.fastq
F1049117.S24fastq_ori/SRR27100574_1.fastqfastq_ori/SRR27100574_2.fastq
F1049117.S25fastq_ori/SRR27100575_1.fastqfastq_ori/SRR27100575_2.fastq
F1049117.S26fastq_ori/SRR27100576_1.fastqfastq_ori/SRR27100576_2.fastq
F1049117.S27fastq_ori/SRR27100577_1.fastqfastq_ori/SRR27100577_2.fastq
F1049117.S28fastq_ori/SRR27100578_1.fastqfastq_ori/SRR27100578_2.fastq
F1049117.S29fastq_ori/SRR27100579_1.fastqfastq_ori/SRR27100579_2.fastq
F1049117.S30fastq_ori/SRR27100580_1.fastqfastq_ori/SRR27100580_2.fastq
F1049117.S31fastq_ori/SRR27100581_1.fastqfastq_ori/SRR27100581_2.fastq
F1049117.S32fastq_ori/SRR27100582_1.fastqfastq_ori/SRR27100582_2.fastq
F1049117.S33fastq_ori/SRR27100583_1.fastqfastq_ori/SRR27100583_2.fastq
F1049117.S34fastq_ori/SRR27100584_1.fastqfastq_ori/SRR27100584_2.fastq
F1049117.S35fastq_ori/SRR27100585_1.fastqfastq_ori/SRR27100585_2.fastq
F1049117.S36fastq_ori/SRR27100586_1.fastqfastq_ori/SRR27100586_2.fastq
F1049117.S37fastq_ori/SRR27100587_1.fastqfastq_ori/SRR27100587_2.fastq
F1049117.S38fastq_ori/SRR27100588_1.fastqfastq_ori/SRR27100588_2.fastq
F1049117.S39fastq_ori/SRR27100589_1.fastqfastq_ori/SRR27100589_2.fastq
F1049117.S40fastq_ori/SRR27100590_1.fastqfastq_ori/SRR27100590_2.fastq
F1049117.S41fastq_ori/SRR27100591_1.fastqfastq_ori/SRR27100591_2.fastq
F1049117.S42fastq_ori/SRR27100592_1.fastqfastq_ori/SRR27100592_2.fastq
F1049117.S43fastq_ori/SRR27100593_1.fastqfastq_ori/SRR27100593_2.fastq
F556311.S01fastq_ori/SRR9821833_1.fastqfastq_ori/SRR9821833_2.fastq
F556311.S02fastq_ori/SRR9821834_1.fastqfastq_ori/SRR9821834_2.fastq
F556311.S03fastq_ori/SRR9821835_1.fastqfastq_ori/SRR9821835_2.fastq
F556311.S04fastq_ori/SRR9821836_1.fastqfastq_ori/SRR9821836_2.fastq
F556311.S05fastq_ori/SRR9821837_1.fastqfastq_ori/SRR9821837_2.fastq
F556311.S06fastq_ori/SRR9821838_1.fastqfastq_ori/SRR9821838_2.fastq
F556311.S07fastq_ori/SRR9821839_1.fastqfastq_ori/SRR9821839_2.fastq
F556311.S08fastq_ori/SRR9821840_1.fastqfastq_ori/SRR9821840_2.fastq
F556311.S09fastq_ori/SRR9821841_1.fastqfastq_ori/SRR9821841_2.fastq
F556311.S10fastq_ori/SRR9821842_1.fastqfastq_ori/SRR9821842_2.fastq
F556311.S11fastq_ori/SRR9821843_1.fastqfastq_ori/SRR9821843_2.fastq
F556311.S12fastq_ori/SRR9821844_1.fastqfastq_ori/SRR9821844_2.fastq
F556311.S13fastq_ori/SRR9821845_1.fastqfastq_ori/SRR9821845_2.fastq
F556311.S14fastq_ori/SRR9821846_1.fastqfastq_ori/SRR9821846_2.fastq
F556311.S15fastq_ori/SRR9821847_1.fastqfastq_ori/SRR9821847_2.fastq
F556311.S16fastq_ori/SRR9821848_1.fastqfastq_ori/SRR9821848_2.fastq
F556311.S17fastq_ori/SRR9821849_1.fastqfastq_ori/SRR9821849_2.fastq
F556311.S18fastq_ori/SRR9821850_1.fastqfastq_ori/SRR9821850_2.fastq
F556311.S19fastq_ori/SRR9821851_1.fastqfastq_ori/SRR9821851_2.fastq
F556311.S20fastq_ori/SRR9821852_1.fastqfastq_ori/SRR9821852_2.fastq
F556311.S21fastq_ori/SRR9821853_1.fastqfastq_ori/SRR9821853_2.fastq
F556311.S22fastq_ori/SRR9821854_1.fastqfastq_ori/SRR9821854_2.fastq
F556311.S23fastq_ori/SRR9821855_1.fastqfastq_ori/SRR9821855_2.fastq
F556311.S24fastq_ori/SRR9821856_1.fastqfastq_ori/SRR9821856_2.fastq
F556311.S25fastq_ori/SRR9821857_1.fastqfastq_ori/SRR9821857_2.fastq
F556311.S26fastq_ori/SRR9821858_1.fastqfastq_ori/SRR9821858_2.fastq
F556311.S27fastq_ori/SRR9821859_1.fastqfastq_ori/SRR9821859_2.fastq
F556311.S28fastq_ori/SRR9821860_1.fastqfastq_ori/SRR9821860_2.fastq
F556311.S29fastq_ori/SRR9821861_1.fastqfastq_ori/SRR9821861_2.fastq
F556311.S30fastq_ori/SRR9821862_1.fastqfastq_ori/SRR9821862_2.fastq
F556311.S31fastq_ori/SRR9821863_1.fastqfastq_ori/SRR9821863_2.fastq
F556311.S32fastq_ori/SRR9821864_1.fastqfastq_ori/SRR9821864_2.fastq
F556311.S33fastq_ori/SRR9821865_1.fastqfastq_ori/SRR9821865_2.fastq
F556311.S34fastq_ori/SRR9821866_1.fastqfastq_ori/SRR9821866_2.fastq
F556311.S35fastq_ori/SRR9821867_1.fastqfastq_ori/SRR9821867_2.fastq
F556311.S36fastq_ori/SRR9821868_1.fastqfastq_ori/SRR9821868_2.fastq
F556311.S37fastq_ori/SRR9821869_1.fastqfastq_ori/SRR9821869_2.fastq
F556311.S38fastq_ori/SRR9821870_1.fastqfastq_ori/SRR9821870_2.fastq
F556311.S39fastq_ori/SRR9821871_1.fastqfastq_ori/SRR9821871_2.fastq
F556311.S40fastq_ori/SRR9821872_1.fastqfastq_ori/SRR9821872_2.fastq
F556311.S41fastq_ori/SRR9821873_1.fastqfastq_ori/SRR9821873_2.fastq
F556311.S42fastq_ori/SRR9821874_1.fastqfastq_ori/SRR9821874_2.fastq
F556311.S43fastq_ori/SRR9821875_1.fastqfastq_ori/SRR9821875_2.fastq
F556311.S44fastq_ori/SRR9821876_1.fastqfastq_ori/SRR9821876_2.fastq
F556311.S45fastq_ori/SRR9821877_1.fastqfastq_ori/SRR9821877_2.fastq
F556311.S46fastq_ori/SRR9821878_1.fastqfastq_ori/SRR9821878_2.fastq
F556311.S47fastq_ori/SRR9821879_1.fastqfastq_ori/SRR9821879_2.fastq
F556311.S48fastq_ori/SRR9821880_1.fastqfastq_ori/SRR9821880_2.fastq
F556311.S49fastq_ori/SRR9821881_1.fastqfastq_ori/SRR9821881_2.fastq
F556311.S50fastq_ori/SRR9821882_1.fastqfastq_ori/SRR9821882_2.fastq
F556311.S51fastq_ori/SRR9821883_1.fastqfastq_ori/SRR9821883_2.fastq
F556311.S52fastq_ori/SRR9821884_1.fastqfastq_ori/SRR9821884_2.fastq
F556311.S53fastq_ori/SRR9821885_1.fastqfastq_ori/SRR9821885_2.fastq
F556311.S54fastq_ori/SRR9821886_1.fastqfastq_ori/SRR9821886_2.fastq
F556311.S55fastq_ori/SRR9821887_1.fastqfastq_ori/SRR9821887_2.fastq
F556311.S56fastq_ori/SRR9821888_1.fastqfastq_ori/SRR9821888_2.fastq
F556311.S57fastq_ori/SRR9821889_1.fastqfastq_ori/SRR9821889_2.fastq
F556311.S58fastq_ori/SRR9821890_1.fastqfastq_ori/SRR9821890_2.fastq
F556311.S59fastq_ori/SRR9821891_1.fastqfastq_ori/SRR9821891_2.fastq
F556311.S60fastq_ori/SRR9821892_1.fastqfastq_ori/SRR9821892_2.fastq
F598825.S01fastq_ori/SRR10849321_1.fastqfastq_ori/SRR10849321_2.fastq
F598825.S02fastq_ori/SRR10849322_1.fastqfastq_ori/SRR10849322_2.fastq
F598825.S03fastq_ori/SRR10849323_1.fastqfastq_ori/SRR10849323_2.fastq
F598825.S04fastq_ori/SRR10849324_1.fastqfastq_ori/SRR10849324_2.fastq
F598825.S05fastq_ori/SRR10849325_1.fastqfastq_ori/SRR10849325_2.fastq
F598825.S06fastq_ori/SRR10849326_1.fastqfastq_ori/SRR10849326_2.fastq
F598825.S07fastq_ori/SRR10849327_1.fastqfastq_ori/SRR10849327_2.fastq
F598825.S08fastq_ori/SRR10849328_1.fastqfastq_ori/SRR10849328_2.fastq
F598825.S09fastq_ori/SRR10849329_1.fastqfastq_ori/SRR10849329_2.fastq
F598825.S10fastq_ori/SRR10849330_1.fastqfastq_ori/SRR10849330_2.fastq
F598825.S11fastq_ori/SRR10849331_1.fastqfastq_ori/SRR10849331_2.fastq
F598825.S12fastq_ori/SRR10849332_1.fastqfastq_ori/SRR10849332_2.fastq
F598825.S13fastq_ori/SRR10849333_1.fastqfastq_ori/SRR10849333_2.fastq
F598825.S14fastq_ori/SRR10849334_1.fastqfastq_ori/SRR10849334_2.fastq
F598825.S15fastq_ori/SRR10849335_1.fastqfastq_ori/SRR10849335_2.fastq
F598825.S16fastq_ori/SRR10849336_1.fastqfastq_ori/SRR10849336_2.fastq
F598825.S17fastq_ori/SRR10849337_1.fastqfastq_ori/SRR10849337_2.fastq
F598825.S18fastq_ori/SRR10849338_1.fastqfastq_ori/SRR10849338_2.fastq
F598825.S19fastq_ori/SRR10849339_1.fastqfastq_ori/SRR10849339_2.fastq
F598825.S20fastq_ori/SRR10849340_1.fastqfastq_ori/SRR10849340_2.fastq
F598825.S21fastq_ori/SRR10849341_1.fastqfastq_ori/SRR10849341_2.fastq
F598825.S22fastq_ori/SRR10849342_1.fastqfastq_ori/SRR10849342_2.fastq
F598825.S23fastq_ori/SRR10849343_1.fastqfastq_ori/SRR10849343_2.fastq
F598825.S24fastq_ori/SRR10849344_1.fastqfastq_ori/SRR10849344_2.fastq
F598825.S25fastq_ori/SRR10849345_1.fastqfastq_ori/SRR10849345_2.fastq
F598825.S26fastq_ori/SRR10849346_1.fastqfastq_ori/SRR10849346_2.fastq
F598825.S27fastq_ori/SRR10849347_1.fastqfastq_ori/SRR10849347_2.fastq
F598825.S28fastq_ori/SRR10849348_1.fastqfastq_ori/SRR10849348_2.fastq
F598825.S29fastq_ori/SRR10849349_1.fastqfastq_ori/SRR10849349_2.fastq
F598825.S30fastq_ori/SRR10849350_1.fastqfastq_ori/SRR10849350_2.fastq
F756771.S01fastq_ori/SRR15560286_1.fastqfastq_ori/SRR15560286_2.fastq
F756771.S02fastq_ori/SRR15560287_1.fastqfastq_ori/SRR15560287_2.fastq
F756771.S03fastq_ori/SRR15560288_1.fastqfastq_ori/SRR15560288_2.fastq
F756771.S04fastq_ori/SRR15560289_1.fastqfastq_ori/SRR15560289_2.fastq
F756771.S05fastq_ori/SRR15560290_1.fastqfastq_ori/SRR15560290_2.fastq
F756771.S06fastq_ori/SRR15560291_1.fastqfastq_ori/SRR15560291_2.fastq
F756771.S07fastq_ori/SRR15560292_1.fastqfastq_ori/SRR15560292_2.fastq
F756771.S08fastq_ori/SRR15560293_1.fastqfastq_ori/SRR15560293_2.fastq
F756771.S09fastq_ori/SRR15560294_1.fastqfastq_ori/SRR15560294_2.fastq
F756771.S10fastq_ori/SRR15560295_1.fastqfastq_ori/SRR15560295_2.fastq
F756771.S11fastq_ori/SRR15560296_1.fastqfastq_ori/SRR15560296_2.fastq
F756771.S12fastq_ori/SRR15560297_1.fastqfastq_ori/SRR15560297_2.fastq
F756771.S13fastq_ori/SRR15560298_1.fastqfastq_ori/SRR15560298_2.fastq
F756771.S14fastq_ori/SRR15560299_1.fastqfastq_ori/SRR15560299_2.fastq
F756771.S15fastq_ori/SRR15560300_1.fastqfastq_ori/SRR15560300_2.fastq
F756771.S16fastq_ori/SRR15560301_1.fastqfastq_ori/SRR15560301_2.fastq
F756771.S17fastq_ori/SRR15560302_1.fastqfastq_ori/SRR15560302_2.fastq
F756771.S18fastq_ori/SRR15560303_1.fastqfastq_ori/SRR15560303_2.fastq
F756771.S19fastq_ori/SRR15560304_1.fastqfastq_ori/SRR15560304_2.fastq
F756771.S20fastq_ori/SRR15560305_1.fastqfastq_ori/SRR15560305_2.fastq
F756771.S21fastq_ori/SRR15560306_1.fastqfastq_ori/SRR15560306_2.fastq
F756771.S22fastq_ori/SRR15560307_1.fastqfastq_ori/SRR15560307_2.fastq
F756771.S23fastq_ori/SRR15560308_1.fastqfastq_ori/SRR15560308_2.fastq
F756771.S24fastq_ori/SRR15560309_1.fastqfastq_ori/SRR15560309_2.fastq
F756771.S25fastq_ori/SRR15560310_1.fastqfastq_ori/SRR15560310_2.fastq
F756771.S26fastq_ori/SRR15560311_1.fastqfastq_ori/SRR15560311_2.fastq
F756771.S27fastq_ori/SRR15560312_1.fastqfastq_ori/SRR15560312_2.fastq
F756771.S28fastq_ori/SRR15560313_1.fastqfastq_ori/SRR15560313_2.fastq
F756771.S29fastq_ori/SRR15560314_1.fastqfastq_ori/SRR15560314_2.fastq
F756771.S30fastq_ori/SRR15560315_1.fastqfastq_ori/SRR15560315_2.fastq
F756771.S31fastq_ori/SRR15560316_1.fastqfastq_ori/SRR15560316_2.fastq
F756771.S32fastq_ori/SRR15560317_1.fastqfastq_ori/SRR15560317_2.fastq
F756771.S33fastq_ori/SRR15560318_1.fastqfastq_ori/SRR15560318_2.fastq
F266382.S01fastq_ori/SRR2064219.fastq
F266382.S02fastq_ori/SRR2064220.fastq
F266382.S03fastq_ori/SRR2064221.fastq
F266382.S04fastq_ori/SRR2064222.fastq
F266382.S05fastq_ori/SRR2064223.fastq
F266382.S06fastq_ori/SRR2064224.fastq
F266382.S07fastq_ori/SRR2064225.fastq
F266382.S08fastq_ori/SRR2064226.fastq
F266382.S09fastq_ori/SRR2064227.fastq
F266382.S10fastq_ori/SRR2064228.fastq
F266382.S11fastq_ori/SRR2064229.fastq
F266382.S12fastq_ori/SRR2064230.fastq
F266382.S13fastq_ori/SRR2064231.fastq
F266382.S14fastq_ori/SRR2064232.fastq
F266382.S15fastq_ori/SRR2064233.fastq
F266382.S16fastq_ori/SRR2064234.fastq
F266382.S17fastq_ori/SRR2064235.fastq
F266382.S18fastq_ori/SRR2064236.fastq
F266382.S19fastq_ori/SRR2064237.fastq
F266382.S20fastq_ori/SRR2064238.fastq
F266382.S21fastq_ori/SRR2064239.fastq
F266382.S22fastq_ori/SRR2064240.fastq
F266382.S23fastq_ori/SRR2064241.fastq
F266382.S24fastq_ori/SRR2064242.fastq
F266382.S25fastq_ori/SRR2064243.fastq
F266382.S26fastq_ori/SRR2064244.fastq
F266382.S27fastq_ori/SRR2064245.fastq
F266382.S28fastq_ori/SRR2064246.fastq
F266382.S29fastq_ori/SRR2064247.fastq
F266382.S30fastq_ori/SRR2064248.fastq
F266382.S31fastq_ori/SRR2064249.fastq
F266382.S32fastq_ori/SRR2064250.fastq
F266382.S33fastq_ori/SRR2064251.fastq
F266382.S34fastq_ori/SRR2064252.fastq
F266382.S35fastq_ori/SRR2064253.fastq
F266382.S36fastq_ori/SRR2064254.fastq
F266382.S37fastq_ori/SRR2064255.fastq
F266382.S38fastq_ori/SRR2064256.fastq
F266382.S39fastq_ori/SRR2064257.fastq
F266382.S40fastq_ori/SRR2064258.fastq
F266382.S41fastq_ori/SRR2064259.fastq
F266382.S42fastq_ori/SRR2064260.fastq
F266382.S43fastq_ori/SRR2064261.fastq
F266382.S44fastq_ori/SRR2064262.fastq
F266382.S45fastq_ori/SRR2064263.fastq
F266382.S46fastq_ori/SRR2064264.fastq
F266382.S47fastq_ori/SRR2064265.fastq
F266382.S48fastq_ori/SRR2064266.fastq
F266382.S49fastq_ori/SRR2064267.fastq
F266382.S50fastq_ori/SRR2064268.fastq
F266382.S51fastq_ori/SRR2064269.fastq
F266382.S52fastq_ori/SRR2064270.fastq
F266382.S53fastq_ori/SRR2064271.fastq
F266382.S54fastq_ori/SRR2064272.fastq
F266382.S55fastq_ori/SRR2064273.fastq
F266382.S56fastq_ori/SRR2064274.fastq
F266382.S57fastq_ori/SRR2064275.fastq
F266382.S58fastq_ori/SRR2064276.fastq
F266382.S59fastq_ori/SRR2064277.fastq
F266382.S60fastq_ori/SRR2064278.fastq
F295501.S01fastq_ori/SRR2914373.fastq
F295501.S02fastq_ori/SRR2914374.fastq
F295501.S03fastq_ori/SRR2914375.fastq
F295501.S04fastq_ori/SRR2914376.fastq
F295501.S05fastq_ori/SRR2914377.fastq
F295501.S06fastq_ori/SRR2914378.fastq
F295501.S07fastq_ori/SRR2914379.fastq
F295501.S08fastq_ori/SRR2914380.fastq
F295501.S09fastq_ori/SRR2914381.fastq
F295501.S10fastq_ori/SRR2914382.fastq
F295501.S11fastq_ori/SRR2914383.fastq
F295501.S12fastq_ori/SRR2914384.fastq
F295501.S13fastq_ori/SRR2914385.fastq
F295501.S14fastq_ori/SRR2989657.fastq

Please download and save the file to your computer storage device. The download link will expire after 60 days upon your receiving of this report.

Raw sequence data download link:

 

VI. Analysis - DADA2 Read Processing

What is DADA2?

DADA2 is a software package that models and corrects Illumina-sequenced amplicon errors [1]. DADA2 infers sample sequences exactly, without coarse-graining into OTUs, and resolves differences of as little as one nucleotide. DADA2 identified more real variants and output fewer spurious sequences than other methods.

DADA2’s advantage is that it uses more of the data. The DADA2 error model incorporates quality information, which is ignored by all other methods after filtering. The DADA2 error model incorporates quantitative abundances, whereas most other methods use abundance ranks if they use abundance at all. The DADA2 error model identifies the differences between sequences, eg. A->C, whereas other methods merely count the mismatches. DADA2 can parameterize its error model from the data itself, rather than relying on previous datasets that may or may not reflect the PCR and sequencing protocols used in your study.

DADA2 Software Package is available as an R package at : https://benjjneb.github.io/dada2/index.html

References

  1. Callahan BJ, McMurdie PJ, Rosen MJ, Han AW, Johnson AJ, Holmes SP. DADA2: High-resolution sample inference from Illumina amplicon data. Nat Methods. 2016 Jul;13(7):581-3. doi: 10.1038/nmeth.3869. Epub 2016 May 23. PMID: 27214047; PMCID: PMC4927377.

Analysis Procedures:

DADA2 pipeline includes several tools for read quality control, including quality filtering, trimming, denoising, pair merging and chimera filtering. Below are the major processing steps of DADA2:

Step 1. Read trimming based on sequence quality The quality of NGS Illumina sequences often decreases toward the end of the reads. DADA2 allows to trim off the poor quality read ends in order to improve the error model building and pair mergicing performance.

Step 2. Learn the Error Rates The DADA2 algorithm makes use of a parametric error model (err) and every amplicon dataset has a different set of error rates. The learnErrors method learns this error model from the data, by alternating estimation of the error rates and inference of sample composition until they converge on a jointly consistent solution. As in many machine-learning problems, the algorithm must begin with an initial guess, for which the maximum possible error rates in this data are used (the error rates if only the most abundant sequence is correct and all the rest are errors).

Step 3. Infer amplicon sequence variants (ASVs) based on the error model built in previous step. This step is also called sequence "denoising". The outcome of this step is a list of ASVs that are the equivalent of oligonucleotides.

Step 4. Merge paired reads. If the sequencing products are read pairs, DADA2 will merge the R1 and R2 ASVs into single sequences. Merging is performed by aligning the denoised forward reads with the reverse-complement of the corresponding denoised reverse reads, and then constructing the merged “contig” sequences. By default, merged sequences are only output if the forward and reverse reads overlap by at least 12 bases, and are identical to each other in the overlap region (but these conditions can be changed via function arguments).

Step 5. Remove chimera. The core dada method corrects substitution and indel errors, but chimeras remain. Fortunately, the accuracy of sequence variants after denoising makes identifying chimeric ASVs simpler than when dealing with fuzzy OTUs. Chimeric sequences are identified if they can be exactly reconstructed by combining a left-segment and a right-segment from two more abundant “parent” sequences. The frequency of chimeric sequences varies substantially from dataset to dataset, and depends on on factors including experimental procedures and sample complexity.

Results

1. Read Quality Plots NGS sequence analaysis starts with visualizing the quality of the sequencing. Below are the quality plots of the first sample for the R1 and R2 reads separately. In gray-scale is a heat map of the frequency of each quality score at each base position. The mean quality score at each position is shown by the green line, and the quartiles of the quality score distribution by the orange lines. The forward reads are usually of better quality. It is a common practice to trim the last few nucleotides to avoid less well-controlled errors that can arise there. The trimming affects the downstream steps including error model building, merging and chimera calling. FOMC uses an empirical approach to test many combinations of different trim length in order to achieve best final amplicon sequence variants (ASVs), see the next section “Optimal trim length for ASVs”.

Quality plots for all samples:

2. Optimal trim length for ASVs The final number of merged and chimera-filtered ASVs depends on the quality filtering (hence trimming) in the very beginning of the DADA2 pipeline. In order to achieve highest number of ASVs, an empirical approach was used -

  1. Create a random subset of each sample consisting of 5,000 R1 and 5,000 R2 (to reduce computation time)
  2. Trim 10 bases at a time from the ends of both R1 and R2 up to 50 bases
  3. For each combination of trimmed length (e.g., 300x300, 300x290, 290x290 etc), the trimmed reads are subject to the entire DADA2 pipeline for chimera-filtered merged ASVs
  4. The combination with highest percentage of the input reads becoming final ASVs is selected for the complete set of data

Below is the result of such operation, showing ASV percentages of total reads for all trimming combinations (1st Column = R1 lengths in bases; 1st Row = R2 lengths in bases):

R1/R2251241231221211201
25173.88%74.07%74.42%74.60%74.86%75.16%
24174.21%74.38%74.81%74.98%75.18%75.44%
23174.73%74.88%75.36%75.45%75.58%75.87%
22175.10%75.27%75.75%75.91%76.02%76.34%
21175.41%75.58%76.12%76.39%76.56%76.77%
20175.74%75.94%76.40%77.01%77.21%77.43%

Based on the above result, the trim length combination of R1 = 201 bases and R2 = 201 bases (highlighted red above), was chosen for generating final ASVs for all sequences. This combination generated highest number of merged non-chimeric ASVs and was used for downstream analyses, if requested.

3. Error plots from learning the error rates After DADA2 building the error model for the set of data, it is always worthwhile, as a sanity check if nothing else, to visualize the estimated error rates. The error rates for each possible transition (A→C, A→G, …) are shown below. Points are the observed error rates for each consensus quality score. The black line shows the estimated error rates after convergence of the machine-learning algorithm. The red line shows the error rates expected under the nominal definition of the Q-score. The ideal result would be the estimated error rates (black line) are a good fit to the observed rates (points), and the error rates drop with increased quality as expected.

Forward Read R1 Error Plot


Reverse Read R2 Error Plot

The PDF version of these plots are available here:

 

4. DADA2 Result Summary The table below shows the summary of the DADA2 analysis, tracking paired read counts of each samples for all the steps during DADA2 denoising process - including end-trimming (filtered), denoising (denoisedF, denoisedF), pair merging (merged) and chimera removal (nonchim).

Sample IDF73312.S01F73312.S02F73312.S03F73312.S04F73312.S05F73312.S06F73312.S07F73312.S08F73312.S09F73312.S10F73312.S11F73312.S12F73312.S13F73312.S14F73312.S15F73312.S16F73312.S17F73312.S18F73312.S19F73312.S20F73312.S21F73312.S22F73312.S23F73312.S24F73312.S25F73312.S26F73312.S27F73312.S28F73312.S29F73312.S30F73312.S31F73312.S32F73312.S33F73312.S34F73312.S35F73312.S36F73312.S37F73312.S38F73312.S39F73312.S40F73312.S41F73312.S42F73312.S43F73312.S44F73312.S45F73312.S46F73312.S47F73312.S48F73312.S49F73312.S50F73312.S51F73312.S52F73312.S53F73312.S54F73312.S55F73312.S56F73312.S57F73312.S58F73312.S59F73312.S60F73312.S61F73312.S62F73312.S63F73312.S64F73312.S65F73312.S66F73312.S67F73312.S68F73312.S69F73312.S70F73312.S71F73312.S72F73312.S73F73312.S74F73312.S75F73312.S76F73312.S77F73312.S78F73312.S79F73312.S80F73312.S81F73312.S82F73312.S83F73312.S84F73312.S85F73312.S86F73312.S87Row SumPercentage
input95,800100,468136,548313,320369,714169,33383,81933,82995,79586,433225,056184,00655,775128,465162,618278,58497,103163,072189,048137,40278,11266,811100,22990,460207,555122,25245,37296,13280,547147,204141,03540,854168,464126,01795,876170,977148,890139,29744,165128,65472,563131,39162,772171,469165,234155,64022,714162,45865,419112,75299,049144,183134,470124,73642,842135,10495,271122,45278,891141,660134,833131,95846,88684,924249,816193,197347,518311,635332,38960,935349,962216,52870,84367,635117,80898,560104,45029,02496,21058,900111,373155,357138,234157,712138,621163,568124,77311,679,810100.00%
filtered95,800100,463136,546313,316369,709169,33183,81833,82795,79386,431225,051184,00155,774128,462162,615278,58397,101163,065189,045137,39878,10966,811100,22990,458207,550122,25145,37296,13280,544147,203141,03140,851168,461126,01695,874170,973148,888139,29644,165128,65272,562131,38762,771171,468165,227155,63822,714162,45665,418112,75299,046144,181134,470124,73542,842135,09895,270122,44878,890141,657134,830131,95746,88584,923249,813193,193347,506311,632332,38160,934349,951216,52770,83967,633117,80598,559104,45029,02296,20758,900111,370155,356138,232157,711138,619163,567124,77311,679,600100.00%
denoisedF91,98698,597133,801305,182359,141165,52781,30432,20492,90683,054216,493175,75951,100122,218155,074269,89491,092156,868181,261131,12375,50964,06297,85987,605199,607115,63743,73993,51978,164144,208137,49938,626164,868123,06492,684167,621146,111136,31741,210125,31369,981127,90760,258168,230161,648151,70920,590158,88462,880110,05296,365141,341131,832122,68341,040132,36692,845119,68076,059138,696132,474129,30844,28082,709241,821184,210337,387303,633322,86454,740340,156208,19468,86365,149115,28896,550102,06127,14893,80156,968108,579152,041135,336153,226135,388160,261121,19311,326,48096.97%
denoisedR93,72698,572133,529304,935359,480165,69881,42032,68293,23283,694217,320176,47553,215124,217157,154270,57893,018157,191183,571132,99975,59565,06297,85987,484200,546117,99443,68893,59378,353144,192137,28939,633164,645122,94893,833166,867145,957135,85542,601125,65070,752128,03761,166167,755161,882151,52220,578158,82363,850109,93796,904140,604131,552122,16141,563132,33093,321119,58477,012138,565132,129128,71845,59283,085242,613188,270338,171303,793322,90958,760340,649211,21768,86865,489115,08596,453101,94328,04493,81757,411108,415151,772135,062153,999135,652160,226122,08011,370,47097.35%
merged85,70592,831125,418284,823333,660154,93474,53028,62685,09675,510197,844157,60143,650112,168140,804248,64180,053143,460167,111119,17069,22858,58691,05580,312183,155104,96439,42785,69671,815134,616126,41034,622154,530114,17786,520157,072136,604128,15435,120117,64164,416119,92154,292158,500152,184140,90317,122148,85958,940102,70390,726131,909124,260116,03037,434125,07286,503111,08570,927129,151124,325121,65339,82277,082224,025168,840315,324283,329298,60646,943315,860194,04163,60459,103106,69490,88194,75524,52487,22252,413100,588143,320125,989141,284127,447150,106113,13110,493,18789.84%
nonchim68,77574,817105,760219,069268,019127,95763,46526,36566,94866,994168,492135,45340,446101,356122,150210,04573,426123,384143,743105,40660,76850,66478,50668,361153,48394,19634,72373,44961,581109,218102,80230,763119,63494,91569,936120,564111,179106,16332,69389,63454,33199,03247,029126,939122,931119,96616,497117,52549,17682,15574,661106,013105,53889,75833,30398,96473,06895,69460,502107,456101,49095,00336,06861,487187,200139,185256,273238,415229,83341,469250,257154,07252,73053,06487,94069,62377,71422,39072,09142,91679,366113,585105,197111,81599,963123,76894,0378,652,79174.08%

This table can be downloaded as an Excel table below:

 

5. DADA2 Amplicon Sequence Variants (ASVs). A total of 8296 unique merged and chimera-free ASV sequences were identified, and their corresponding read counts for each sample are available in the "ASV Read Count Table" with rows for the ASV sequences and columns for sample. This read count table can be used for microbial profile comparison among different samples and the sequences provided in the table can be used to taxonomy assignment.

 

The table can be downloaded from this link:

 
 

Sample Meta Information

Download Sample Meta Information
#SampleIDGroup
DGP103-13-M0DGP103
DGP103-13-S0DGP103
DGP103-19-D2DGP103
DGP103-30-D0DGP103
DGP106-04-D3DGP106
DGP106-13-D2DGP106
DGP106-20-M3DGP106
DGP106-28-S3DGP106
DGP107-03-D0DGP107
DGP107-29-S2DGP107
DGP107-30-S1DGP107
DGP108-21-S2DGP108
DGP108-30-D0DGP108
DGP108-30-D2DGP108
DGP114-20-M0DGP116
DGP116-07-D0DGP116
DGP116-08-D0DGP116
DGP118-06-S0DGP118
DGP118-06-S2DGP118
DGP118-14-D2DGP118
 
 

ASV Read Counts by Samples

#Sample IDRead Count
DGP103-13-S084
DGP107-29-S2109
DGP107-30-S13,020
DGP108-21-S24,530
DGP106-04-D35,338
DGP107-03-D05,847
DGP106-13-D26,245
DGP118-14-D27,394
DGP108-30-D07,867
DGP116-07-D08,209
DGP108-30-D28,938
DGP116-08-D09,110
DGP106-20-M39,521
DGP114-20-M010,208
DGP103-30-D011,226
DGP106-28-S313,146
DGP118-06-S213,183
DGP103-19-D213,946
DGP103-13-M018,718
DGP118-06-S031,655
 
 
 

VII. Analysis - Read Taxonomy Assignment

Read Taxonomy Assignment - Methods

 

The close-reference taxonomy assignment of the ASV sequences using BLASTN is based on the algorithm published by Al-Hebshi et. al. (2015)[2].

The species-level, open-reference 16S rRNA NGS reads taxonomy assignment pipeline

Version 20210310a
 
 

1. Raw sequences reads in FASTA format were BLASTN-searched against a combined set of 16S rRNA reference sequences - the FOMC 16S rRNA Reference Sequences version 20221029 (https://microbiome.forsyth.org/ftp/refseq/). This set consists of the HOMD (version 15.22 http://www.homd.org/index.php?name=seqDownload&file&type=R ), Mouse Oral Microbiome Database (MOMD version 5.1 https://momd.org/ftp/16S_rRNA_refseq/MOMD_16S_rRNA_RefSeq/V5.1/), and the NCBI 16S rRNA reference sequence set (https://ftp.ncbi.nlm.nih.gov/blast/db/16S_ribosomal_RNA.tar.gz). These sequences were screened and combined to remove short sequences (<1000nt), chimera, duplicated and sub-sequences, as well as sequences with poor taxonomy annotation (e.g., without species information). This process resulted in 1,015 full-length 16S rRNA sequences from HOMD V15.22, 356 from MOMD V5.1, and 22,126 from NCBI, a total of 23,497 sequences. Altogether these sequence represent a total of 17,035 oral and non-oral microbial species.

The NCBI BLASTN version 2.7.1+ (Zhang et al, 2000) [3] was used with the default parameters. Reads with ≥ 98% sequence identity to the matched reference and ≥ 90% alignment length (i.e., ≥ 90% of the read length that was aligned to the reference and was used to calculate the sequence percent identity) were classified based on the taxonomy of the reference sequence with highest sequence identity. If a read matched with reference sequences representing more than one species with equal percent identity and alignment length, it was subject to chimera checking with USEARCH program version v8.1.1861 (Edgar 2010). Non-chimeric reads with multi-species best hits were considered valid and were assigned with a unique species notation (e.g., spp) denoting unresolvable multiple species.

2. Unassigned reads (i.e., reads with < 98% identity or < 90% alignment length) were pooled together and reads < 200 bases were removed. The remaining reads were subject to the de novo operational taxonomy unit (OTU) calling and chimera checking using the USEARCH program version v8.1.1861 (Edgar 2010)[4]. The de novo OTU calling and chimera checking was done using 98% as the sequence identity cutoff, i.e., the species-level OTU. The output of this step produced species-level de novo clustered OTUs with 98% identity. Representative reads from each of the OTUs/species were then BLASTN-searched against the same reference sequence set again to determine the closest species for these potential novel species. These potential novel species were pooled together with the reads that were signed to specie-level in the previous step, for down-stream analyses.

Reference:

  1. Al-Hebshi NN, Nasher AT, Idris AM, Chen T. Robust species taxonomy assignment algorithm for 16S rRNA NGS reads: application to oral carcinoma samples. J Oral Microbiol. 2015 Sep 29;7:28934. doi: 10.3402/jom.v7.28934. PMID: 26426306; PMCID: PMC4590409.
  2. Zhang Z, Schwartz S, Wagner L, Miller W. A greedy algorithm for aligning DNA sequences. J Comput Biol. 2000 Feb-Apr;7(1-2):203-14. doi: 10.1089/10665270050081478. PMID: 10890397.
  3. Edgar RC. Search and clustering orders of magnitude faster than BLAST. Bioinformatics. 2010 Oct 1;26(19):2460-1. doi: 10.1093/bioinformatics/btq461. Epub 2010 Aug 12. PubMed PMID: 20709691.
  4. 3. Designations used in the taxonomy:

    	1) Taxonomy levels are indicated by these prefixes:
    	
    	   k__: domain/kingdom
    	   p__: phylum
    	   c__: class
    	   o__: order
    	   f__: family
    	   g__: genus  
    	   s__: species
    	
    	   Example: 
    	
    	   k__Bacteria;p__Firmicutes;c__Clostridia;o__Clostridiales;f__Lachnospiraceae;g__Blautia;s__faecis
    		
    	2) Unique level identified – known species:
    	   
    	   k__Bacteria;p__Firmicutes;c__Clostridia;o__Clostridiales;f__Lachnospiraceae;g__Roseburia;s__hominis
    	
    	   The above example shows some reads match to a single species (all levels are unique)
    	
    	3) Non-unique level identified – known species:
    
    	   k__Bacteria;p__Firmicutes;c__Clostridia;o__Clostridiales;f__Lachnospiraceae;g__Roseburia;s__multispecies_spp123_3
    	   
    	   The above example “s__multispecies_spp123_3” indicates certain reads equally match to 3 species of the 
    	   genus Roseburia; the “spp123” is a temporally assigned species ID.
    	
    	   k__Bacteria;p__Firmicutes;c__Clostridia;o__Clostridiales;f__Lachnospiraceae;g__multigenus;s__multispecies_spp234_5
    	   
    	   The above example indicates certain reads match equally to 5 different species, which belong to multiple genera.; 
    	   the “spp234” is a temporally assigned species ID.
    	
    	4) Unique level identified – unknown species, potential novel species:
    	   
    	   k__Bacteria;p__Firmicutes;c__Clostridia;o__Clostridiales;f__Lachnospiraceae;g__Roseburia;s__ hominis_nov_97%
    	   
    	   The above example indicates that some reads have no match to any of the reference sequences with 
    	   sequence identity ≥ 98% and percent coverage (alignment length)  ≥ 98% as well. However this groups 
    	   of reads (actually the representative read from a de novo  OTU) has 96% percent identity to 
    	   Roseburia hominis, thus this is a potential novel species, closest to Roseburia hominis. 
    	   (But they are not the same species).
    	
    	5) Multiple level identified – unknown species, potential novel species:
    	   k__Bacteria;p__Firmicutes;c__Clostridia;o__Clostridiales;f__Lachnospiraceae;g__Roseburia;s__ multispecies_sppn123_3_nov_96%
    	
    	   The above example indicates that some reads have no match to any of the reference sequences 
    	   with sequence identity ≥ 98% and percent coverage (alignment length)  ≥ 98% as well. 
    	   However this groups of reads (actually the representative read from a de novo  OTU) 
    	   has 96% percent identity equally to 3 species in Roseburia. Thus this is no single 
    	   closest species, instead this group of reads match equally to multiple species at 96%. 
    	   Since they have passed chimera check so they represent a novel species. “sppn123” is a 
    	   temporary ID for this potential novel species. 
    

 
4. The taxonomy assignment algorithm is illustrated in this flow char below:
 
 
 
 

Read Taxonomy Assignment - Result Summary *

CodeCategoryMPC=0% (>=1 read)MPC=0.01%(>=18 reads)
ATotal reads188,294188,294
BTotal assigned reads186,053186,053
CAssigned reads in species with read count < MPC0515
DAssigned reads in samples with read count < 500188188
ETotal samples2020
FSamples with reads >= 5001818
GSamples with reads < 50022
HTotal assigned reads used for analysis (B-C-D)185,865185,350
IReads assigned to single species182,621182,135
JReads assigned to multiple species1,2851,256
KReads assigned to novel species1,9591,959
LTotal number of species362294
MNumber of single species348283
NNumber of multi-species96
ONumber of novel species55
PTotal unassigned reads2,2412,241
QChimeric reads00
RReads without BLASTN hits00
SOthers: short, low quality, singletons, etc.2,2412,241
A=B+P=C+D+H+Q+R+S
E=F+G
B=C+D+H
H=I+J+K
L=M+N+O
P=Q+R+S
* MPC = Minimal percent (of all assigned reads) read count per species, species with read count < MPC were removed.
* Samples with reads < 500 were removed from downstream analyses.
* The assignment result from MPC=0.1% was used in the downstream analyses.
 
 
 

Read Taxonomy Assignment - ASV Species-Level Read Counts Table

This table shows the read counts for each sample (columns) and each species identified based on the ASV sequences. The downstream analyses were based on this table.
SPIDTaxonomyDGP103-13-M0DGP103-13-S0DGP103-19-D2DGP103-30-D0DGP106-04-D3DGP106-13-D2DGP106-20-M3DGP106-28-S3DGP107-03-D0DGP107-29-S2DGP107-30-S1DGP108-21-S2DGP108-30-D0DGP108-30-D2DGP114-20-M0DGP116-07-D0DGP116-08-D0DGP118-06-S0DGP118-06-S2DGP118-14-D2
SP1Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;sp._oral_taxon_300000058001200140004153700
SP10Bacteria;Proteobacteria;Epsilonproteobacteria;Campylobacterales;Campylobacteraceae;Campylobacter;concisus5601459326411600111201000017210
SP100Bacteria;SR1;SR1_[C-1];SR1_[O-1];SR1_[F-1];SR1_[G-1];sp._oral_taxon_34500000010054000000001232224
SP101Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetaceae;Actinomyces;sp._oral_taxon_1701490019000170000000001800
SP103Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Alloprevotella;sp._oral_taxon_9130000000000000000635260
SP104Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;infantis340000000001680094000000
SP105Bacteria;Proteobacteria;Gammaproteobacteria;Pasteurellales;Pasteurellaceae;Aggregatibacter;aphrophilus00000178000500000003300
SP107Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Bergeyella;sp._oral_taxon_322164341579533400000016000712
SP108Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;socranskii0000000000018600031473010
SP109Bacteria;Saccharibacteria_(TM7);TM7_[C-1];TM7_[O-1];TM7_[F-1];TM7_[G-1];sp._oral_taxon_95250074029521490000000080184720
SP11Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;oris0019141925842185751390025781400268118667013
SP110Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Fusobacteriaceae;Fusobacterium;sp._oral_taxon_20300000000201033000068816514594857
SP111Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;sp._oral_taxon_3170016330002000050751504001315229
SP112Bacteria;Proteobacteria;Gammaproteobacteria;Pasteurellales;Pasteurellaceae;Aggregatibacter;sp._oral_taxon_9490010300090000000800000
SP113Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_23000000010100000000005493
SP114Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Capnocytophaga;sp._oral_taxon_33685016019705033400000000000
SP115Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;artemidis000002000001006000000
SP116Bacteria;Synergistetes;Synergistia;Synergistales;Synergistaceae;Fretibacterium;sp._oral_taxon_3620000000000000000037025
SP117Bacteria;Proteobacteria;Betaproteobacteria;Neisseriales;Neisseriaceae;Neisseria;flavescens|subflava00130058000010016240141613192
SP119Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;intermedia0050000220000000002185189
SP12Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;sp._oral_taxon_30400000000000032000044136166
SP120Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Capnocytophaga;sp._oral_taxon_326004702170500000000000000
SP121Bacteria;Firmicutes;Clostridia;Clostridiales;Peptostreptococcaceae_[XI];Filifactor;alocis00142204144620003516000531182191
SP122Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Alloprevotella;sp._oral_taxon_91200000000000000082113120
SP123Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;sp._oral_taxon_4311200000000076060000000
SP124Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Porphyromonadaceae;Tannerella;forsythia0012001803680025473602994781448145133
SP125Bacteria;Firmicutes;Clostridia;Clostridiales;Peptostreptococcaceae_[XI];Peptostreptococcaceae_[XI][G-7];[Eubacterium]_yurii_subsp._schtitka00000000000000000869916
SP126Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;veroralis003701101005000000000000
SP127Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Veillonellaceae_[G-1];sp._oral_taxon_1500000000000024000713000
SP128Bacteria;Synergistetes;Synergistia;Synergistales;Synergistaceae;Fretibacterium;sp._oral_taxon_359000000000002828310000290
SP129Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;pleuritidis00774740472728000000000000
SP13Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetaceae;Actinomyces;sp._oral_taxon_17555000701300006433751371100
SP130Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;constellatus0032380002614001308401925000
SP131Bacteria;Proteobacteria;Betaproteobacteria;Neisseriales;Neisseriaceae;Neisseria;oralis21014000000000000001000
SP132Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Micrococcaceae;Rothia;mucilaginosa500120361078002820134028000710
SP133Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;sp._oral_taxon_05830115633052727137100000061111200032
SP134Bacteria;Firmicutes;Bacilli;Bacillales;Gemellaceae;Gemella;morbillorum0042121724641700023663847115293230
SP135Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Megasphaera;micronuciformis160110447800000150000000
SP136Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Capnocytophaga;gingivalis130140401485560022071317118090
SP137Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Lachnoanaerobaculum;sp._oral_taxon_089000900001400000000000
SP139Bacteria;Saccharibacteria_(TM7);TM7_[C-1];TM7_[O-1];TM7_[F-1];TM7_[G-1];sp._oral_taxon_3490003050023000597015213422121022
SP140Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Porphyromonadaceae;Porphyromonas;sp._oral_taxon_2780000000039000000001200
SP141Bacteria;Saccharibacteria_(TM7);TM7_[C-1];TM7_[O-1];TM7_[F-1];TM7_[G-2];sp._oral_taxon_35000000223914000000000000
SP142Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Porphyromonadaceae;Porphyromonas;gingivalis21002000011480800007072883355530902378
SP143Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;maltophilum0000000090000150243249178
SP144Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;mitis60900960618200001001275153510004154
SP146Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_23700000000000278231000315123164
SP147Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetales_[F];Actinomycetales_[G];sp._Oral_Taxon_C050000000000000001212000
SP148Bacteria;Bacteroidetes;Sphingobacteriia;Sphingobacteriales;Sphingobacteriaceae;Sphingobacterium;multivorum007000000000000004000
SP149Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Fusobacteriaceae;Fusobacterium;periodonticum0000000000003600007535824
SP15Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;sp._oral_taxon_4430000070032000000009119
SP150Bacteria;Proteobacteria;Gammaproteobacteria;Pseudomonadales;Moraxellaceae;Acinetobacter;johnsonii018254551770110000554000033800
SP151Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;sp._oral_taxon_13800600010090002700001980
SP152Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Porphyromonadaceae;Tannerella;sp._oral_taxon_916000000000000000000310
SP153Bacteria;Firmicutes;Clostridia;Clostridiales;Peptostreptococcaceae_[XI];Peptostreptococcaceae_[XI][G-7];sp._oral_taxon_081000003051100000000108496
SP154Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_257000000060000000001641437
SP155Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;oulorum66088331339313030001611251019541000
SP156Bacteria;Proteobacteria;Epsilonproteobacteria;Campylobacterales;Campylobacteraceae;Campylobacter;showae40450097119101200261571900035300
SP157Bacteria;Firmicutes;Clostridia;Clostridiales;Peptoniphilaceae;Parvimonas;sp._oral_taxon_1100011023900002850000180000
SP158Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Capnocytophaga;sp._oral_taxon_4128302142420009000000012189000
SP159Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;oralis12407511481688302000090126120000
SP16Bacteria;Actinobacteria;Actinobacteria;Corynebacteriales;Corynebacteriaceae;Corynebacterium;durum11600000700000005360000
SP160Bacteria;Proteobacteria;Gammaproteobacteria;Pseudomonadales;Pseudomonadaceae;Pseudomonas;pseudoalcaligenes002000000000000000000
SP161Bacteria;Firmicutes;Clostridia;Clostridiales;Ruminococcaceae;Ruminococcaceae_[G-1];sp._oral_taxon_0752401581217084751570003000001660
SP162Bacteria;Proteobacteria;Betaproteobacteria;Neisseriales;Neisseriaceae;Eikenella;corrodens005000000008218026012800
SP163Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;disiens000000000000000720000
SP164Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;sp._oral_taxon_5260000000018000022000152320
SP165Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;medium0012240000800000000956828
SP168Bacteria;Proteobacteria;Epsilonproteobacteria;Campylobacterales;Campylobacteraceae;Campylobacter;rectus0054103037000000000001872391
SP169Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Porphyromonadaceae;Tannerella;sp._oral_taxon_28663830001503000955182223001400
SP17Bacteria;Actinobacteria;Actinobacteria;Propionibacteriales;Propionibacteriaceae;Propionibacterium;sp._oral_taxon_194190740000000000000000
SP170Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Micrococcaceae;Micrococcus;luteus_Oral_Taxon_H68000000000000000004900
SP171Bacteria;Proteobacteria;Gammaproteobacteria;Pasteurellales;Pasteurellaceae;Aggregatibacter;sp._oral_taxon_45800410000000001830800000
SP172Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;pallens000000700000032000000
SP173Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;buccalis904093005892620000014201800292240
SP174Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Bacteroidaceae;Bacteroidaceae_[G-1];sp._oral_taxon_2720000000000000001359777
SP176Bacteria;Firmicutes;Clostridia;Clostridiales;Peptoniphilaceae;Parvimonas;micra1102512050087473002141362300168791822911
SP177Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Micrococcaceae;Rothia;dentocariosa7425028778810861579001000033916249000
SP178Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;goodfellowii567015821905510700000000400
SP179Bacteria;Chloroflexi;Anaerolineae;Anaerolineales;Anaerolineaceae;Anaerolineae_[G-1];sp._oral_taxon_4390000000080000400023190
SP18Bacteria;Firmicutes;Clostridia;Clostridiales;Clostridiales_[F-1];Clostridiales_[F-1][G-1];sp._oral_taxon_093003001100000000000472733
SP181Bacteria;Proteobacteria;Gammaproteobacteria;Pasteurellales;Pasteurellaceae;Aggregatibacter;sp._oral_taxon_513000000000000000004238147
SP182Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Anaeroglobus;geminatus00090000000045005812614260
SP183Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_247000000000000000005617748
SP185Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;sp._oral_taxon_212577215480141000000001700242024
SP186Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Dialister;sp._oral_taxon_1190000000000000001817400
SP187Bacteria;Proteobacteria;Epsilonproteobacteria;Campylobacterales;Campylobacteraceae;Campylobacter;gracilis5602341376043282783508410210503448692413814
SP188Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;intermedius382002833807500011000000000
SP19Bacteria;Firmicutes;Bacilli;Lactobacillales;Carnobacteriaceae;Granulicatella;elegans000000000000024000070
SP190Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;tigurinus0000176110680000000000220
SP191Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_23100000117014009280630005170
SP192Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;marshii0000000000008000017180
SP193Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Lachnoanaerobaculum;umeaense1003202401062360015356900000
SP196Bacteria;Firmicutes;Clostridia;Clostridiales;Peptostreptococcaceae_[XI];Peptostreptococcaceae_[XI][G-1];[Eubacterium]_infirmum7098013001400010004123210
SP197Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Oribacterium;sp._oral_taxon_0780011134000048002634001223000
SP198Bacteria;Synergistetes;Synergistia;Synergistales;Synergistaceae;Fretibacterium;fastidiosum0000000027000000611156230
SP199Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Alloprevotella;rava0070010044000070000007
SP2Bacteria;Firmicutes;Clostridia;Clostridiales;Peptococcaceae;Peptococcus;sp._oral_taxon_1670034730070100000000054128
SP200Bacteria;Proteobacteria;Betaproteobacteria;Burkholderiales;Burkholderiaceae;Lautropia;mirabilis830117060000000078001600
SP201Bacteria;Firmicutes;Clostridia;Clostridiales;Peptostreptococcaceae_[XI];Peptostreptococcus;stomatis00292001004968060826000118236
SP204Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;mutans00007070000000600000
SP205Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Stomatobaculum;longum000012000000090070000
SP206Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;sanguinis530031651014142700066200121373008900
SP208Bacteria;Bacteroidetes;Bacteroidetes_[C-1];Bacteroidetes_[O-1];Bacteroidetes_[F-1];Bacteroidetes_[G-3];sp._oral_taxon_365009007005800000000141310
SP209Bacteria;Proteobacteria;Betaproteobacteria;Neisseriales;Neisseriaceae;Kingella;oralis58020632114000507611826000
SP21Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Fusobacteriaceae;Fusobacterium;nucleatum_subsp._vincentii820252475143427856120434902054553107301307114331054795
SP210Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Stomatobaculum;sp._oral_taxon_373000000000000000001245
SP212Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Veillonellaceae_[G-1];sp._oral_taxon_132000000000003100002000
SP213Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;vestibularis30000200120000000000000
SP214Bacteria;Firmicutes;Clostridia;Clostridiales;Ruminococcaceae;Ruminococcaceae_[G-2];sp._oral_taxon_08500540000168002170000060
SP215Bacteria;Actinobacteria;Coriobacteriia;Coriobacteriales;Coriobacteriaceae;Atopobium;rimae003635020080000130088600
SP216Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;salivae60009301121000150200015000
SP217Bacteria;Firmicutes;Bacilli;Lactobacillales;Aerococcaceae;Abiotrophia;defectiva3001700000001001415000000
SP218Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Fusobacteriaceae;Fusobacterium;naviforme4501182380000000800000000
SP219Bacteria;Proteobacteria;Deltaproteobacteria;Desulfovibrionales;Desulfomicrobiaceae;Desulfomicrobium;orale0000000000000000011507
SP22Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;dianae0000000000000000039370
SP220Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;sp._oral_taxon_919000000000000000001633
SP221Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetaceae;Actinomyces;israelii000000000000000002700
SP222Bacteria;Proteobacteria;Deltaproteobacteria;Desulfobacterales;Desulfobulbaceae;Desulfobulbus;sp._oral_taxon_0410000000000000000111570
SP223Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Shuttleworthia;satelles8029501000500000000000
SP224Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Capnocytophaga;sp._oral_taxon_324470831410000000000000000
SP226Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Porphyromonadaceae;Porphyromonas;sp._oral_taxon_2770000000000020301790000017
SP227Bacteria;Proteobacteria;Betaproteobacteria;Neisseriales;Neisseriaceae;Kingella;denitrificans000001700000000102416000
SP228Bacteria;Proteobacteria;Gammaproteobacteria;Pseudomonadales;Moraxellaceae;Acinetobacter;sp._Oral_Taxon_C510066000000600019000000
SP229Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;shahii00480013710500000002700000
SP23Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;australis130900000001830000000010
SP230Bacteria;Proteobacteria;Gammaproteobacteria;Pasteurellales;Pasteurellaceae;Aggregatibacter;sp._oral_taxon_5120000000000000001130013
SP231Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;saccharolytica0031001900100000000030390
SP232Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Catonella;sp._oral_taxon_4510000000000000000073139
SP233Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Johnsonella;ignava30250000011060000002900
SP234Bacteria;Proteobacteria;Epsilonproteobacteria;Campylobacterales;Campylobacteraceae;Campylobacter;sp._oral_taxon_0440000000000000000004028
SP235Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Micrococcaceae;Rothia;aeria506051500560000000229116223000
SP237Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;micans008200600000000000652220
SP238Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;sp._oral_taxon_475000000000000000000580
SP239Bacteria;Proteobacteria;Betaproteobacteria;Neisseriales;Neisseriaceae;Neisseria;pharyngis000001600000003000000
SP24Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Dialister;pneumosintes0037701002810007816031505134
SP240Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Lachnospiraceae_[G-8];sp._oral_taxon_500000000000000000014100159
SP241Bacteria;Saccharibacteria_(TM7);TM7_[C-1];TM7_[O-1];TM7_[F-2];TM7_[G-5];sp._oral_taxon_356002700024246202940135183230000910
SP243Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;infelix0020000007000140000060
SP246Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;wadei180148011203024462001698119763290000
SP247Bacteria;Saccharibacteria_(TM7);TM7_[C-1];TM7_[O-1];TM7_[F-1];TM7_[G-1];sp._oral_taxon_3471186000001300000000139900000
SP249Bacteria;Proteobacteria;Gammaproteobacteria;Cardiobacteriales;Cardiobacteriaceae;Cardiobacterium;hominis00502090000000880000
SP25Bacteria;Actinobacteria;Actinobacteria;Corynebacteriales;Corynebacteriaceae;Corynebacterium;matruchotii200354286427011001314406162835596800
SP252Bacteria;Proteobacteria;Betaproteobacteria;Neisseriales;Neisseriaceae;Neisseria;elongata0013001700000000080646
SP253Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;sp._oral_taxon_2155404012526000018017800004200
SP254Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;sp._oral_taxon_137000001300000500000000
SP255Bacteria;Proteobacteria;Gammaproteobacteria;Cardiobacteriales;Cardiobacteriaceae;Cardiobacterium;valvarum0010000000000000001800
SP256Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetaceae;Actinomyces;oris1200060000000002700000
SP258Bacteria;Firmicutes;Mollicutes;Mycoplasmatales;Mycoplasmataceae;Mycoplasma;salivarium008130004000042001039000
SP259Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;multiformis60300000000010177000000
SP26Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;melaninogenica1180011262212332004321265560001700
SP260Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Veillonellaceae_[G-1];sp._oral_taxon_1450000000000020400000000
SP261Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Capnocytophaga;sp._oral_taxon_864003000002700000000155379
SP262Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_23400000000000000000138020
SP263Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Megasphaera;sp._oral_taxon_123000000000000000538215120
SP264Bacteria;Proteobacteria;Alphaproteobacteria;Rhodobacterales;Rhodobacteraceae;Paracoccus;sp._Oral_Taxon_H67000000000000000002100
SP267Bacteria;Firmicutes;Bacilli;Bacillales;Gemellaceae;Gemella;bergeri0000705818000000000000
SP268Bacteria;SR1;SR1_[C-1];SR1_[O-1];SR1_[F-1];SR1_[G-1];sp._oral_taxon_87400000883000030005000120
SP27Bacteria;Proteobacteria;Gammaproteobacteria;Pasteurellales;Pasteurellaceae;Aggregatibacter;segnis00800132000000000012000
SP270Bacteria;Firmicutes;Clostridia;Clostridiales;Peptostreptococcaceae_[XI];Peptostreptococcaceae_[XI][G-9];[Eubacterium]_brachy0011021000400028002810120100
SP271Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Veillonella;atypica2000024000000000000000
SP272Bacteria;Proteobacteria;Alphaproteobacteria;Sphingomonadales;Sphingomonadaceae;Sphingomonas;hankookensis0021401400000060000000
SP274Bacteria;Proteobacteria;Gammaproteobacteria;Pseudomonadales;Moraxellaceae;Acinetobacter;lwoffii0000000014000290000000
SP275Bacteria;Firmicutes;Clostridia;Clostridiales;Peptoniphilaceae;Parvimonas;sp._oral_taxon_393000000000000000000360
SP276Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Capnocytophaga;sp._oral_taxon_3800000110035120336838700000
SP277Bacteria;Firmicutes;Clostridia;Clostridiales;Peptostreptococcaceae_[XI];Peptostreptococcaceae_[XI][G-7];[Eubacterium]_yurii_subsp._yurii_&_margaretiae003600000000000000137125
SP278Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;flueggei000004000000160000000
SP28Bacteria;Proteobacteria;Gammaproteobacteria;Pasteurellales;Pasteurellaceae;Haemophilus;parainfluenzae482032014311103000103203705300121120
SP280Bacteria;Proteobacteria;Gammaproteobacteria;Pasteurellales;Pasteurellaceae;Aggregatibacter;actinomycetemcomitans000000000000000001227414
SP282Bacteria;Firmicutes;Mollicutes;Mycoplasmatales;Mycoplasmataceae;Mycoplasma;faucium000000000000010000292632
SP283Bacteria;Firmicutes;Clostridia;Clostridiales;Peptostreptococcaceae_[XI];Peptostreptococcaceae_[XI][G-6];[Eubacterium]_nodatum000000000000500001602
SP284Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Bergeyella;sp._oral_taxon_9000032008490000000000799
SP285Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;histicola4600500000000027000000
SP286Bacteria;Firmicutes;Erysipelotrichia;Erysipelotrichales;Erysipelotrichaceae;Erysipelotrichaceae_[G-1];sp._oral_taxon_90500177000015000220050030
SP289Bacteria;Firmicutes;Clostridia;Clostridiales;Peptostreptococcaceae_[XI];Peptostreptococcaceae_[XI][G-5];[Eubacterium]_saphenum00000000000000000111012
SP29Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Porphyromonadaceae;Porphyromonas;catoniae002500184260000000090641116
SP290Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Lachnospiraceae_[G-2];sp._oral_taxon_088000000000000000007270
SP291Bacteria;Proteobacteria;Gammaproteobacteria;Pseudomonadales;Moraxellaceae;Acinetobacter;sp._str._DR10023200470000540340156000000
SP294Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;dentalis000000007000015000000
SP295Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetaceae;Actinomyces;odontolyticus0000000000000120610000
SP296Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Empedobacter;falsenii0100320000000000000000
SP3Bacteria;Proteobacteria;Betaproteobacteria;Burkholderiales;Comamonadaceae;Delftia;sp._Oral_Taxon_A59000000000000000402000
SP30Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;sp._oral_taxon_0560000010810000000000000
SP300Bacteria;Firmicutes;Clostridia;Clostridiales;Peptostreptococcaceae_[XI];Peptostreptococcaceae_[XI][G-4];sp._oral_taxon_3690000050000009302111112248
SP301Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;sp._oral_taxon_47900000005000050000508
SP304Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;trevisanii000000103300000000008400
SP305Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetaceae;Actinomyces;sp._oral_taxon_1711800000000000092500000
SP307Bacteria;Proteobacteria;Alphaproteobacteria;Rhizobiales;Rhizobiaceae;Rhizobium;larrymoorei_Oral_Taxon_D4500630070000011036000000
SP309Bacteria;Firmicutes;Erysipelotrichia;Erysipelotrichales;Erysipelotrichaceae;Solobacterium;moorei00451400019500025120110200
SP31Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Fusobacteriaceae;Fusobacterium;nucleatum_subsp._animalis871139893389612167748548850221141326106024429414316968
SP310Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_2620000006000000000076150
SP311Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Oribacterium;sinus110000000007000000840
SP312Bacteria;Firmicutes;Erysipelotrichia;Erysipelotrichales;Erysipelotrichaceae;Bulleidia;extructa007000000000053000000
SP314Bacteria;Proteobacteria;Alphaproteobacteria;Caulobacterales;Caulobacteraceae;Brevundimonas;vesicularis_Oral_Taxon_C59002100000000000000000
SP315Bacteria;Proteobacteria;Gammaproteobacteria;Chromatiales;Chromatiaceae;Rheinheimera;chironomi00700000000078000000
SP317Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Veillonellaceae_[G-1];sp._oral_taxon_155000000000001880000000
SP32Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Capnocytophaga;sputigena19000012976000070000040
SP320Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Lachnoanaerobaculum;sp._oral_taxon_083000000000000000000370
SP321Bacteria;Saccharibacteria_(TM7);TM7_[C-1];TM7_[O-1];TM7_[F-1];TM7_[G-6];sp._oral_taxon_870004100010800000290000000
SP322Bacteria;Proteobacteria;Gammaproteobacteria;Pseudomonadales;Moraxellaceae;Acinetobacter;baumannii0000000000001937000000
SP323Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Micrococcaceae;Micrococcus;luteus_Oral_Taxon_C78000000000000000002000
SP325Bacteria;Proteobacteria;Betaproteobacteria;Neisseriales;Neisseriaceae;Neisseria;flava000000000023000000000
SP327Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;sp._oral_taxon_221709000230000000000000
SP329Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;sp._oral_taxon_146000000021000000000000
SP33Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;sp._oral_taxon_39200670097350200012149676130069330
SP330Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetaceae;Actinomyces;naeslundii7800000000000054700800
SP335Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_238000000000000000003475972
SP336Bacteria;Firmicutes;Erysipelotrichia;Erysipelotrichales;Erysipelotrichaceae;Erysipelotrichaceae_[G-1];sp._oral_taxon_904000000003700000000000
SP337Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_25800000000000000000263514
SP339Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;sp._oral_taxon_301000000050000400710000
SP34Bacteria;Proteobacteria;Alphaproteobacteria;Caulobacterales;Caulobacteraceae;Asticcacaulis;excentricus008000000000014000000
SP341Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;baroniae0000000000003005665360
SP342Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_270000000000002411000730
SP343Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;sp._oral_taxon_2230000580995300000000000
SP344Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetaceae;Actinomyces;massiliensis3200000000000001200000
SP345Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;sp._Oral_Taxon_G55000000000000000006180
SP346Bacteria;Proteobacteria;Gammaproteobacteria;Pseudomonadales;Moraxellaceae;Acinetobacter;sp._Oral_Taxon_C810000000000036078000000
SP348Bacteria;Proteobacteria;Betaproteobacteria;Neisseriales;Neisseriaceae;Neisseria;mucosa0000000000001100001900
SP35Bacteria;Proteobacteria;Alphaproteobacteria;Caulobacterales;Caulobacteraceae;Caulobacter;crescentus000005000008014000000
SP350Bacteria;Bacteroidetes;Bacteroidetes_[C-1];Bacteroidetes_[O-1];Bacteroidetes_[F-1];Bacteroidetes_[G-3];sp._oral_taxon_28000000000000000000472913
SP351Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetaceae;Actinomyces;sp._oral_taxon_525000000000000000200000
SP352Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_517000000000000000002700
SP353Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;sp._oral_taxon_95100300000000000000262725
SP36Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;dentisani4703501432693222400015129912533301420455
SP37Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;sputigena00003002500084006082690
SP38Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Fusobacteriaceae;Fusobacterium;nucleatum_subsp._polymorphum001302082116000015360119144255423011642
SP39Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Capnocytophaga;sp._oral_taxon_33500000601330030026906044
SP4Bacteria;Spirochaetes;Spirochaetes;Spirochaetales;Spirochaetaceae;Treponema;sp._Oral_Taxon_G7700000000000099000900
SP40Bacteria;Proteobacteria;Betaproteobacteria;Burkholderiales;Comamonadaceae;Delftia;acidovorans0010008000003024000000
SP42Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Alloprevotella;tannerae16015531041417446418800411470036818120764820
SP43Bacteria;Proteobacteria;Gammaproteobacteria;Pseudomonadales;Moraxellaceae;Moraxella;osloensis00700000000073300506200
SP44Bacteria;Proteobacteria;Gammaproteobacteria;Pseudomonadales;Moraxellaceae;Acinetobacter;sp._Oral_Taxon_A58000740800050803109027800
SP45Bacteria;Firmicutes;Bacilli;Lactobacillales;Carnobacteriaceae;Granulicatella;adiacens9301612248246610617752781031691806
SP46Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;sp._oral_taxon_892000000000000600002580
SP47Bacteria;Synergistetes;Synergistia;Synergistales;Synergistaceae;Fretibacterium;sp._oral_taxon_360000000000000000556316800
SP48Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetaceae;Actinomyces;sp._oral_taxon_1800000000000011819300000
SP49Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;denticola006041050311000012507007828000
SP50Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;sp._oral_taxon_481000000016000700000500
SP51Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Lachnospiraceae_[G-3];sp._oral_taxon_10040504046544600101351900042209
SP52Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Capnocytophaga;granulosa003335421872710100045341432654000
SP53Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;parasanguinis_II16709413908539002606471100000
SP54Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;gordonii33000374664180000962660713217700
SP55Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;lecithinolyticum007000007001423800011480
SP56Bacteria;Firmicutes;Bacilli;Bacillales;Gemellaceae;Gemella;haemolysans118040002000010009700060
SP57Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Dialister;invisus613226156312246685004521204855143012
SP59Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;hongkongensis003570000000069010974428280000
SP6Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Veillonella;parvula_group1162024410606296110932213001953921196255732903772100
SP60Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;cristatus001540080021081169113703095881900
SP61Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Porphyromonadaceae;Tannerella;sp._oral_taxon_8080018420005400009500012000
SP62Bacteria;Actinobacteria;Actinobacteria;Actinomycetales;Actinomycetaceae;Actinomyces;sp._oral_taxon_1694370001904430000223819000000
SP63Bacteria;Actinobacteria;Coriobacteriia;Coriobacteriales;Coriobacteriaceae;Atopobium;parvulum20000330300000000000100
SP65Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Alloprevotella;sp._oral_taxon_47300000000000000000033742
SP66Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Porphyromonadaceae;Porphyromonas;sp._oral_taxon_2791105726010000000000319011380
SP67Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Porphyromonadaceae;Porphyromonas;endodontalis80662100154462142800167363920001156314131355
SP68Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;sp._oral_taxon_4171408732228580000000000000
SP69Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Bacteroidales_[F-2];Bacteroidales_[G-2];sp._oral_taxon_274001708730203904040029420070410337
SP7Bacteria;Saccharibacteria_(TM7);TM7_[C-1];TM7_[O-1];TM7_[F-1];TM7_[G-1];sp._oral_taxon_34865310221010500460000006437441816
SP72Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Porphyromonadaceae;Porphyromonas;sp._oral_taxon_275000000000000000004712331
SP73Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;sp._oral_taxon_4231050501366671881361204700205000249476818017
SP74Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Catonella;morbi0006011232240035023010018215415
SP76Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;anginosus0000000217600173523000000
SP77Bacteria;Actinobacteria;Actinobacteria;Propionibacteriales;Propionibacteriaceae;Propionibacterium;propionicum3150000020007000101001600
SP78Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Selenomonas;noxia7043109170617002225270991300
SP79Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Butyrivibrio;sp._oral_taxon_0800000000000000000046390
SP8Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;vincentii000000000000000000230
SP80Bacteria;Saccharibacteria_(TM7);TM7_[C-1];TM7_[O-1];TM7_[F-1];TM7_[G-3];sp._oral_taxon_3510015169701235000250000003
SP82Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;sp._oral_taxon_225000003100000000400637
SP83Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;sp._Oral_Taxon_B5700000000000000000244026
SP84Bacteria;Firmicutes;Erysipelotrichia;Erysipelotrichales;Erysipelotrichaceae;Eggerthia;catenaformis0000000012000020000504
SP85Bacteria;Saccharibacteria_(TM7);TM7_[C-1];TM7_[O-1];TM7_[F-1];TM7_[G-1];sp._oral_taxon_34615041621102159012536400859300115453321728
SP86Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Lachnoanaerobaculum;saburreum40013131033142027002041490259000
SP87Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;sp._oral_taxon_0703080019761874000017700040160
SP88Bacteria;Proteobacteria;Betaproteobacteria;Neisseriales;Neisseriaceae;Neisseria;sicca22016000000000000000346
SP89Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;hofstadii11352211930194500000430203000027
SP9Bacteria;Firmicutes;Clostridia;Clostridiales;Lachnospiraceae_[XIV];Johnsonella;sp._oral_taxon_16600000000270000000034027
SP90Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;sp._oral_taxon_31400000830393000203779000000
SP91Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Leptotrichiaceae;Leptotrichia;sp._oral_taxon_49800008260290000000002055015
SP92Bacteria;Spirochaetes;Spirochaetia;Spirochaetales;Spirochaetaceae;Treponema;denticola0080024505000182786000312120302
SP93Bacteria;Bacteroidetes;Bacteroidetes_[C-1];Bacteroidetes_[O-1];Bacteroidetes_[F-1];Bacteroidetes_[G-5];sp._oral_taxon_51100620051006700000000251759
SP95Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;sp._oral_taxon_064920624808298390000002440001313
SP97Bacteria;Proteobacteria;Gammaproteobacteria;Pseudomonadales;Moraxellaceae;Acinetobacter;sp._Oral_Taxon_C990034200188000390300156000000
SP98Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Fusobacteriaceae;Fusobacterium;sp._HOT_204110286800260000210280002548725
SP99Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;maculosa0057615190212000642327013124190
SPN1Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Fusobacteriaceae;Fusobacterium;nucleatum_subsp._animalis_nov_97.859%00000011019118000000558215000
SPN2Bacteria;Proteobacteria;Alphaproteobacteria;Rhodobacterales;Rhodobacteraceae;Gemmobacter;aquatilis_nov_97.921%001607003000000020022900
SPN3Bacteria;Bacteroidetes;Bacteroidetes_[C-1];Bacteroidetes_[O-1];Bacteroidetes_[F-1];Bacteroidetes_[G-5];sp._oral_taxon_505_nov_95.652%000000000000000009255101
SPN4Bacteria;Bacteroidetes;Flavobacteriia;Flavobacteriales;Flavobacteriaceae;Capnocytophaga;sp._oral_taxon_903_nov_97.505%430711130000000000000000
SPN5Bacteria;Saccharibacteria_(TM7);TM7_[C-1];TM7_[O-1];TM7_[F-1];TM7_[G-1];sp._oral_taxon_869_nov_95.585%0000000000000000073440
SPP1Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;multispecies_spp1_2000000000000061000003
SPP4Bacteria;Proteobacteria;Alphaproteobacteria;Rhizobiales;Rhizobiales_multifamily;Rhizobiales_multifamily_multigenus;multispecies_spp4_2000000000000054000000
SPP5Bacteria;Bacteroidetes;Bacteroidia;Bacteroidales;Prevotellaceae;Prevotella;multispecies_spp5_2000000029000642125000000
SPP6Bacteria;Firmicutes;Bacilli;Lactobacillales;Streptococcaceae;Streptococcus;multispecies_spp6_238407130000000000000000
SPP7Bacteria;Fusobacteria;Fusobacteriia;Fusobacteriales;Fusobacteriaceae;Fusobacterium;multispecies_spp7_2490116237000000016100000000
SPP9Bacteria;Firmicutes;Negativicutes;Selenomonadales;Veillonellaceae;Veillonella;multispecies_spp9_2320000000000000000000
 
 
Download OTU Tables at Different Taxonomy Levels
PhylumCount*: Relative**: CLR***:
ClassCount*: Relative**: CLR***:
OrderCount*: Relative**: CLR***:
FamilyCount*: Relative**: CLR***:
GenusCount*: Relative**: CLR***:
SpeciesCount*: Relative**: CLR***:
* Read count
** Relative abundance (count/total sample count)
*** Centered log ratio transformed abundance
;
 
The species listed in the table has full taxonomy and a dynamically assigned species ID specific to this report. When some reads match with the reference sequences of more than one species equally (i.e., same percent identiy and alignmnet coverage), they can't be assigned to a particular species. Instead, they are assigned to multiple species with the species notaton "s__multispecies_spp2_2". In this notation, spp2 is the dynamic ID assigned to these reads that hit multiple sequences and the "_2" at the end of the notation means there are two species in the spp2.

You can look up which species are included in the multi-species assignment, in this table below:
 
 
 
 
Another type of notation is "s__multispecies_sppn2_2", in which the "n" in the sppn2 means it's a potential novel species because all the reads in this species have < 98% idenity to any of the reference sequences. They were grouped together based on de novo OTU clustering at 98% identity cutoff. And then a representative sequence was chosed to BLASTN search against the reference database to find the closest match (but will still be < 98%). This representative sequence also matched equally to more than one species, hence the "spp" was given in the label.
 
 

Taxonomy Bar Plots for All Samples

 
 

Taxonomy Bar Plots for Individual Comparison Groups

 
 
Comparison No.Comparison NameFamiliesGeneraSpecies
Comparison 1DGP103 vs DGP106 vs DGP107 vs DGP108 vs DGP116 vs DGP118PDFSVGPDFSVGPDFSVG
 
 

VIII. Analysis - Alpha Diversity

 

In ecology, alpha diversity (α-diversity) is the mean species diversity in sites or habitats at a local scale. The term was introduced by R. H. Whittaker[5][6] together with the terms beta diversity (β-diversity) and gamma diversity (γ-diversity). Whittaker's idea was that the total species diversity in a landscape (gamma diversity) is determined by two different things, the mean species diversity in sites or habitats at a more local scale (alpha diversity) and the differentiation among those habitats (beta diversity).

 

References:

  1. Whittaker, R. H. (1960) Vegetation of the Siskiyou Mountains, Oregon and California. Ecological Monographs, 30, 279–338. doi:10.2307/1943563
  2. Whittaker, R. H. (1972). Evolution and Measurement of Species Diversity. Taxon, 21, 213-251. doi:10.2307/1218190

 

Alpha Diversity Analysis by Rarefaction

Diversity measures are affected by the sampling depth. Rarefaction is a technique to assess species richness from the results of sampling. Rarefaction allows the calculation of species richness for a given number of individual samples, based on the construction of so-called rarefaction curves. This curve is a plot of the number of species as a function of the number of samples. Rarefaction curves generally grow rapidly at first, as the most common species are found, but the curves plateau as only the rarest species remain to be sampled [7].


References:

  1. Willis AD. Rarefaction, Alpha Diversity, and Statistics. Front Microbiol. 2019 Oct 23;10:2407. doi: 10.3389/fmicb.2019.02407. PMID: 31708888; PMCID: PMC6819366.

 
 
 

Boxplot of Alpha-diversity Indices

The two main factors taken into account when measuring diversity are richness and evenness. Richness is a measure of the number of different kinds of organisms present in a particular area. Evenness compares the similarity of the population size of each of the species present. There are many different ways to measure the richness and evenness. These measurements are called "estimators" or "indices". Below is a diversity of 3 commonly used indices showing the values for all the samples (dots) and in groups (boxes) at the species level.

Printed on each graph is the statistical significance p values of the difference between the groups. The significance is calculated using either Kruskal-Wallis test or the Wilcoxon rank sum test, both are non-parametric methods (since microbiome read count data are considered non-normally distributed) for testing whether samples originate from the same distribution (i.e., no difference between groups). The Kruskal-Wallis test is used to compare three or more independent groups to determine if there are statistically significant differences between their medians. The Wilcoxon Rank Sum test, also known as the Mann-Whitney U test, is used to compare two independent groups to determine if there is a significant difference between their distributions.
The p-value is shown on the top of each graph. A p-value < 0.05 is considered statistically significant between/among the test groups.

 
Alpha Diversity Box Plots for All Groups - Species Level
 
 
 
 
 
 
 
 
 
Alpha Diversity Box Plots for Individual Comparisons at Species level
 
Comparison 1DGP103 vs DGP106 vs DGP107 vs DGP108 vs DGP116 vs DGP118View in PDFView in SVG
 
The above comparisons are at the species-level. Comparisons of other taxonomy levels, from phylum to genus, are also available:
 
 
 

IX. Analysis - Beta Diversity

 

NMDS and PCoA Plots

Beta diversity compares the similarity (or dissimilarity) of microbial profiles between different groups of samples. There are many different similarity/dissimilarity metrics [8]. In general, they can be quantitative (using sequence abundance, e.g., Bray-Curtis or weighted UniFrac) or binary (considering only presence-absence of sequences, e.g., binary Jaccard or unweighted UniFrac). They can be even based on phylogeny (e.g., UniFrac metrics) or not (non-UniFrac metrics, such as Bray-Curtis, etc.).

For microbiome studies, species profiles of samples can be compared with the Bray-Curtis dissimilarity, which is based on the count data type. The pair-wise Bray-Curtis dissimilarity matrix of all samples can then be subject to either multi-dimensional scaling (MDS, also known as PCoA) or non-metric MDS (NMDS).

MDS/PCoA is a scaling or ordination method that starts with a matrix of similarities or dissimilarities between a set of samples and aims to produce a low-dimensional graphical plot of the data in such a way that distances between points in the plot are close to original dissimilarities.

NMDS is similar to MDS, however it does not use the dissimilarities data, instead it converts them into the ranks and use these ranks in the calculation.

References:

  1. Plantinga, AM, Wu, MC (2021). Beta Diversity and Distance-Based Analysis of Microbiome Data. In: Datta, S., Guha, S. (eds) Statistical Analysis of Microbiome Data. Frontiers in Probability and the Statistical Sciences. Springer, Cham. https://doi.org/10.1007/978-3-030-73351-3_5

In our beta diversity analysis, Bray-Curtis dissimilarity matrix was first calculated and then plotted by the PCoA and NMDS separately. Below are beta diveristy results for all groups together, at the Species level:

 
 
NMDS and PCoA Plots for All Groups - Species Level
 
 
 
 
 

The above PCoA and NMDS plots are based on count data. The count data can also be transformed into centered log ratio (CLR) for each species. The CLR data is no longer count data and cannot be used in Bray-Curtis dissimilarity calculation. Instead CLR can be compared with Euclidean distances. When CLR data are compared by Euclidean distance, the distance is also called Aitchison distance.

Below are the NMDS and PCoA plots of the Aitchison distances of the samples at the Species level:

 
 
 
 
 
 
 
NMDS and PCoA Plots for Individual Comparisons at Species level
 
 
Comparison No.Comparison NameNMDAPCoA
Bray-CurtisCLR EuclideanBray-CurtisCLR Euclidean
Comparison 1DGP103 vs DGP106 vs DGP107 vs DGP108 vs DGP116 vs DGP118PDFSVGPDFSVGPDFSVGPDFSVG
 
 
 
 
 
 

Interactive 3D PCoA Plots - Bray-Curtis Dissimilarity

 
 
 

Interactive 3D PCoA Plots - Euclidean Distance

 
 
 

Interactive 3D PCoA Plots - Correlation Coefficients

 
 
 

X. Analysis - Differential Abundance

16S rRNA next generation sequencing (NGS) generates a fixed number of reads that reflect the proportion of different species in a sample, i.e., the relative abundance of species, instead of the absolute abundance. In Mathematics, measurements involving probabilities, proportions, percentages, and ppm can all be thought of as compositional data. This makes the microbiome read count data “compositional” (Gloor et al, 2017). In general, compositional data represent parts of a whole which only carry relative information [9].

The problem of microbiome data being compositional arises when comparing two groups of samples for identifying “differentially abundant” species. A species with the same absolute abundance between two conditions, its relative abundances in the two conditions (e.g., percent abundance) can become different if the relative abundance of other species change greatly. This problem can lead to incorrect conclusion in terms of differential abundance for microbial species in the samples.

When studying differential abundance (DA), the current better approach is to transform the read count data into log ratio data. The ratios are calculated between read counts of all species in a sample to a “reference” count (e.g., mean read count of the sample). The log ratio data allow the detection of DA species without being affected by percentage bias mentioned above

In this report, a compositional DA analysis tool “ANCOM” (analysis of composition of microbiomes) was used [10]. ANCOM transforms the count data into log-ratios and thus is more suitable for comparing the composition of microbiomes in two or more populations. "ANCOM" generates a table of features with W-statistics and whether the null hypothesis is rejected. The “W” is the W-statistic, or number of features that a single feature is tested to be significantly different against. Hence the higher the "W" the more statistical sifgnificant that a feature/species is differentially abundant.

References:

  1. Gloor GB, Macklaim JM, Pawlowsky-Glahn V, Egozcue JJ. Microbiome Datasets Are Compositional: And This Is Not Optional. Front Microbiol. 2017 Nov 15;8:2224. doi: 10.3389/fmicb.2017.02224. PMID: 29187837; PMCID: PMC5695134.
  2. Mandal S, Van Treuren W, White RA, Eggesbø M, Knight R, Peddada SD. Analysis of composition of microbiomes: a novel method for studying microbial composition. Microb Ecol Health Dis. 2015 May 29;26:27663. doi: 10.3402/mehd.v26.27663. PMID: 26028277; PMCID: PMC4450248.
 
 

ANCOM Differential Abundance Analysis

 
ANCOM Results for Individual Comparisons
Comparison No.Comparison Name
Comparison 1.DGP103 vs DGP106 vs DGP107 vs DGP108 vs DGP116 vs DGP118
 
 

ANCOM-BC2 Differential Abundance Analysis

 

Starting with version V1.2, we include the results of ANCOM-BC (Analysis of Compositions of Microbiomes with Bias Correction) (Lin and Peddada 2020) [11]. ANCOM-BC is an updated version of "ANCOM" that:
(a) provides statistically valid test with appropriate p-values,
(b) provides confidence intervals for differential abundance of each taxon,
(c) controls the False Discovery Rate (FDR),
(d) maintains adequate power, and
(e) is computationally simple to implement.

The bias correction (BC) addresses a challenging problem of the bias introduced by differences in the sampling fractions across samples. This bias has been a major hurdle in performing DA analysis of microbiome data. ANCOM-BC estimates the unknown sampling fractions and corrects the bias induced by their differences among samples. The absolute abundance data are modeled using a linear regression framework.

Starting with version V1.43, ANCOM-BC2 is used instead of ANCOM-BC, So that multiple pairwise directional test can be performed (if there are more than two gorups in a comparison). When performing pairwise directional test, the mixed directional false discover rate (mdFDR) is taken into account. The mdFDR is the combination of false discovery rate due to multiple testing, multiple pairwise comparisons, and directional tests within each pairwise comparison. The mdFDR is adopted from (Guo, Sarkar, and Peddada 2010 [12]; Grandhi, Guo, and Peddada 2016 [13]). For more detail explanation and additional features of ANCOM-BC2 please see author's documentation.

References:

  1. Lin H, Peddada SD. Analysis of compositions of microbiomes with bias correction. Nat Commun. 2020 Jul 14;11(1):3514. doi: 10.1038/s41467-020-17041-7. PMID: 32665548; PMCID: PMC7360769.
  2. Guo W, Sarkar SK, Peddada SD. Controlling false discoveries in multidimensional directional decisions, with applications to gene expression data on ordered categories. Biometrics. 2010 Jun;66(2):485-92. doi: 10.1111/j.1541-0420.2009.01292.x. Epub 2009 Jul 23. PMID: 19645703; PMCID: PMC2895927.
  3. Grandhi A, Guo W, Peddada SD. A multiple testing procedure for multi-dimensional pairwise comparisons with application to gene expression studies. BMC Bioinformatics. 2016 Feb 25;17:104. doi: 10.1186/s12859-016-0937-5. PMID: 26917217; PMCID: PMC4768411.
 
 
ANCOM-BC Results for Individual Comparisons
 
Comparison No.Comparison Name
Comparison 1.DGP103 vs DGP106 vs DGP107 vs DGP108 vs DGP116 vs DGP118
 
 
 
 
 

LEfSe - Linear Discriminant Analysis Effect Size

LEfSe (Linear Discriminant Analysis Effect Size) is an alternative method to find "organisms, genes, or pathways that consistently explain the differences between two or more microbial communities" (Segata et al., 2011) [14]. Specifically, LEfSe uses rank-based Kruskal-Wallis (KW) sum-rank test to detect features with significant differential (relative) abundance with respect to the class of interest. Since it is rank-based, instead of proportional based, the differential species identified among the comparison groups is less biased (than percent abundance based).

Reference:

  1. Segata N, Izard J, Waldron L, Gevers D, Miropolsky L, Garrett WS, Huttenhower C. Metagenomic biomarker discovery and explanation. Genome Biol. 2011 Jun 24;12(6):R60. doi: 10.1186/gb-2011-12-6-r60. PMID: 21702898; PMCID: PMC3218848.
 
DGP103 vs DGP106 vs DGP107 vs DGP108 vs DGP116 vs DGP118
 
 
 
 
 
 
 

XI. Analysis - Heatmap Profile

 

Species vs Sample Abundance Heatmap for All Samples

 
 
 

Heatmaps for Individual Comparisons

 
A) Two-way clustering - clustered on both columns (Samples) and rows (organism)
Comparison No.Comparison NameFamily LevelGenus LevelSpecies Level
Comparison 1DGP103 vs DGP106 vs DGP107 vs DGP108 vs DGP116 vs DGP118PDFSVGPDFSVGPDFSVG
 
 
B) One-way clustering - clustered on rows (organism) only
Comparison No.Comparison NameFamily LevelGenus LevelSpecies Level
Comparison 1DGP103 vs DGP106 vs DGP107 vs DGP108 vs DGP116 vs DGP118PDFSVGPDFSVGPDFSVG
 
 
C) No clustering
Comparison No.Comparison NameFamily LevelGenus LevelSpecies Level
Comparison 1DGP103 vs DGP106 vs DGP107 vs DGP108 vs DGP116 vs DGP118PDFSVGPDFSVGPDFSVG
 
 

XII. Analysis - Network Association

To analyze the co-occurrence or co-exclusion between microbial species among different samples, network correlation analysis tools are usually used for this purpose. However, microbiome count data are compositional. If count data are normalized to the total number of counts in the sample, the data become not independent and traditional statistical metrics (e.g., correlation) for the detection of specie-species relationships can lead to spurious results. In addition, sequencing-based studies typically measure hundreds of OTUs (species) on few samples; thus, inference of OTU-OTU association networks is severely under-powered. We provide the network association result with SparCC (Sparse Correlations for Compositional data)(Friedman & Alm 2012), which is a method for inferring correlations from compositional data. SparCC estimates the linear Pearson correlations between the log-transformed components.


References:

Friedman J, Alm EJ. Inferring correlation networks from genomic survey data. PLoS Comput Biol. 2012;8(9):e1002687. doi: 10.1371/journal.pcbi.1002687. Epub 2012 Sep 20. PMID: 23028285; PMCID: PMC3447976.

 

Association Network Inference by SparCC

 

 

 
 

XIII. Disclaimer

The results of this analysis are for research purpose only. They are not intended to diagnose, treat, cure, or prevent any disease. Forsyth and FOMC are not responsible for use of information provided in this report outside the research area.

 

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