Comparison of fecal and oral collection methods for studies of the human microbiota in two Iranian cohorts

From BugSigDB
Reviewed Marked as Reviewed by Svetlana up on 2024-7-24
study design
Citation
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
Authors
Wu Z, Hullings AG, Ghanbari R, Etemadi A, Wan Y, Zhu B, Poustchi H, Fahraji BB, Sakhvidi MJZ, Shi J, Knight R, Malekzadeh R, Sinha R, Vogtmann E
Journal
BMC microbiology
Year
2021
Keywords:
Comparability, Feces, Iran, Microbiome, Saliva, Stability
BACKGROUND: To initiate fecal and oral collections in prospective cohort studies for microbial analyses, it is essential to understand how field conditions and geographic differences may impact microbial communities. This study aimed to investigate the impact of fecal and oral sample collection methods and room temperature storage on collection samples for studies of the human microbiota. RESULTS: We collected fecal and oral samples from participants in two Iranian cohorts located in rural Yazd (n = 46) and urban Gonbad (n = 38) and investigated room temperature stability over 4 days of fecal (RNAlater and fecal occult blood test [FOBT] cards) and comparability of fecal and oral (OMNIgene ORAL kits and Scope mouthwash) collection methods. We calculated interclass correlation coefficients (ICCs) based on 3 alpha and 4 beta diversity metrics and the relative abundance of 3 phyla. After 4 days at room temperature, fecal stability ICCs and ICCs for Scope mouthwash were generally high for all microbial metrics. Similarly, the fecal comparability ICCs for RNAlater and FOBT cards were high, ranging from 0.63 (95% CI: 0.46, 0.75) for the relative abundance of Firmicutes to 0.93 (95% CI: 0.89, 0.96) for unweighted Unifrac. Comparability ICCs for OMNIgene ORAL and Scope mouthwash were lower than fecal ICCs, ranging from 0.55 (95% CI: 0.36, 0.70) for the Shannon index to 0.79 (95% CI: 0.69, 0.86) for Bray-Curtis. Overall, RNAlater, FOBT cards and Scope mouthwash were stable up to 4 days at room temperature. Samples collected using FOBT cards were generally comparable to RNAlater while the OMNIgene ORAL were less similar to Scope mouthwash. CONCLUSIONS: As microbiome measures for feces samples collected using RNAlater, FOBT cards and oral samples collected using Scope mouthwash were stable over four days at room temperature, these would be most appropriate for microbial analyses in these populations. However, one collection method should be consistently since each method may induce some differences.

Experiment 1


Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/03/23

Curator: EGO

Revision editor(s): EGO, Scholastica

Subjects

Location of subjects
Iran
Host species Species from which microbiome was sampled. Contact us to have more species added.
Homo sapiens
Body site Anatomical site where microbial samples were extracted from according to the Uber Anatomy Ontology
Feces Cow dung,Cow pat,Droppings,Dung,Excrement,Excreta,Faeces,Fecal material,Fecal matter,Fewmet,Frass,Guano,Matières fécales@fr,Merde@fr,Ordure,Partie de la merde@fr,Piece of shit,Porción de mierda@es,Portion of dung,Portion of excrement,Portion of faeces,Portion of fecal material,Portion of fecal matter,Portion of feces,Portion of guano,Portion of scat,Portionem cacas,Scat,Spoor,Spraint,Stool,Teil der fäkalien@de,Feces,feces
Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
Microbiome measurement Microbiome measurement,microbiome measurement
Group 0 name Corresponds to the control (unexposed) group for case-control studies
RNAlater - Day 0
Group 1 name Corresponds to the case (exposed) group for case-control studies
RNAlater - Day 4
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
RNAlater fecal samples after incubation at room temperature for four days (day-4) from Gonbad and Yazd, Iran
Group 0 sample size Number of subjects in the control (unexposed) group
69
Group 1 sample size Number of subjects in the case (exposed) group
64
Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any)
None

Lab analysis

Sequencing type
16S
16S variable region One or more hypervariable region(s) of the bacterial 16S gene
V4
Sequencing platform Manufacturer and experimental platform used for quantifying microbial abundance
Illumina

Statistical Analysis

Data transformation Data transformation applied to microbial abundance measurements prior to differential abundance testing (if any).
relative abundances
Statistical test
Mann-Whitney (Wilcoxon)
Significance threshold p-value or FDR threshold used for differential abundance testing (if any)
0.01
MHT correction Have statistical tests be corrected for multiple hypothesis testing (MHT)?
Yes

Alpha Diversity

Shannon Estimator of species richness and species evenness: more weight on species richness
unchanged
Richness Number of species
unchanged
Faith Phylogenetic diversity, takes into account phylogenetic distance of all taxa identified in a sample
unchanged

Signature 1

Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/03/25

Curator: EGO

Revision editor(s): EGO, Scholastica

Source: Additional files 2 Table S2

Description: Differential abundance analysis of phylum and genus level changes comparing RNAlater fecal samples after incubation at room temperature for four days (day-4) to frozen immediately (day-0) from Gonbad and Yazd, Iran

Abundance in Group 1: increased abundance in RNAlater - Day 4

NCBI Quality ControlLinks
Actinomycetota
Collinsella

Revision editor(s): EGO, Scholastica

Signature 2

Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/03/25

Curator: EGO

Revision editor(s): EGO, Scholastica

Source: Additional files 2 Table S2

Description: Differential abundance analysis of phylum and genus level changes comparing RNAlater fecal samples after incubation at room temperature for four days (day-4) to frozen immediately (day-0) from Gonbad and Yazd, Iran

Abundance in Group 1: decreased abundance in RNAlater - Day 4

NCBI Quality ControlLinks
Coprococcus 3Coprococcus 3

Revision editor(s): EGO, Scholastica

Experiment 2


Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/03/26

Curator: EGO

Revision editor(s): EGO, Scholastica

Differences from previous experiment shown

Subjects

Group 1 name Corresponds to the case (exposed) group for case-control studies
Fecal occult blood test [FOBT] cards - Day 0
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Fecal occult blood test [FOBT] cards fecal samples frozen immediately (day-0) from Gonbad and Yazd, Iran
Group 1 sample size Number of subjects in the case (exposed) group
70

Lab analysis

Statistical Analysis

Alpha Diversity

Shannon Estimator of species richness and species evenness: more weight on species richness
unchanged
Richness Number of species
unchanged
Faith Phylogenetic diversity, takes into account phylogenetic distance of all taxa identified in a sample
unchanged

Signature 1

Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/03/26

Curator: EGO

Revision editor(s): EGO, Scholastica

Source: Additional files 2 Table S4

Description: Differential abundance analysis of phylum and genus level changes comparing RNAlater to FOBT card fecal samples frozen immediately (day-0) from Gonbad and Yazd, Iran

Abundance in Group 1: increased abundance in Fecal occult blood test [FOBT] cards - Day 0

NCBI Quality ControlLinks
Actinomycetota
Bacillota
Bifidobacterium
Collinsella
Eggerthella
Enterorhabdus
Senegalimassilia
Eggerthellaceae bacterium
Lactobacillus
Lactococcus
Streptococcus
Clostridium
Mogibacterium
Clostridiales Family XIII bacterium
Anaerostipes
Blautia
CAG-56CAG-56
Coprococcus 1Coprococcus 1
Coprococcus 2Coprococcus 2
Coprococcus 3Coprococcus 3
Dorea
Fusicatenibacter
Lachnospiraceae FCS020 groupLachnospiraceae FCS020 group
Lachnospiraceae ND3007 groupLachnospiraceae ND3007 group
Marvinbryantia
Anaerobutyricum hallii
Eubacterium ventriosum
Eubacterium xylanophilum
Ruminococcus gauvreauii
Mediterraneibacter gnavus
[Ruminococcus] torques
Lachnospiraceae
Intestinibacter
Romboutsia
Terrisporobacter
Butyricicoccus
Faecalibacterium
Negativibacillus
uncultured Oscillospiraceae bacterium
Ruminococcus
Subdoligranulum
Eubacterium coprostanoligenes
Holdemanella
Solobacterium
Megasphaera
Mitsuokella

Revision editor(s): EGO, Scholastica

Signature 2

Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/03/26

Curator: EGO

Revision editor(s): EGO, Scholastica

Source: Additional files 2 Table S8

Description: Differential abundance analysis of phylum level changes comparing OMNIgene ORAL kit samples to Scope mouthwash oral samples from Gonbad and Yazd, Iran

Abundance in Group 1: decreased abundance in Fecal occult blood test [FOBT] cards - Day 0

NCBI Quality ControlLinks
Bacteroidota
Cyanobacteriota
Lentisphaerota
Pseudomonadota
Mycoplasmatota
Bacteroides
Barnesiella
Butyricimonas
Odoribacter
metagenome
gut metagenome
Alloprevotella
Prevotella 2Prevotella 2
Prevotella 7Prevotella 7
Prevotella 9Prevotella 9
Prevotellaceae NK3B31 groupPrevotellaceae NK3B31 group
uncultured Prevotellaceae bacterium
Alistipes
Rikenellaceae RC9 gut groupRikenellaceae RC9 gut group
Parabacteroides
Candidatus Gastranaerophilales
Christensenellaceae R-7 groupChristensenellaceae R-7 group
Clostridiales vadinBB60 groupClostridiales vadinBB60 group
Butyrivibrio
GCA-900066575GCA-900066575
Lachnospira
uncultured Lachnospiraceae bacterium
Lachnospira eligens
Eubacterium ruminantium
Candidatus Soleaferrea
Oscillibacter
Ruminiclostridium 6Ruminiclostridium 6
uncultured Oscillospiraceae bacterium
Eubacteriales
Asteroleplasma
Erysipelotrichaceae UCG-004Erysipelotrichaceae UCG-004
Victivallis
Rhodospirillales
Bilophila
Desulfovibrio
Succinivibrio
Parasutterella
Sutterella
Burkholderiaceae
Candidatus Izemoplasmatales
Mollicutes
Puniceicoccaceae

Revision editor(s): EGO, Scholastica

Experiment 3


Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/07/23

Curator: Scholastica

Revision editor(s): Scholastica

Differences from previous experiment shown

Subjects

Body site Anatomical site where microbial samples were extracted from according to the Uber Anatomy Ontology
Saliva Sailva normalis,Saliva atomaris,Saliva molecularis,Salivary gland secretion,Saliva,saliva
Group 0 name Corresponds to the control (unexposed) group for case-control studies
Scope mouthwash - Day 0
Group 1 name Corresponds to the case (exposed) group for case-control studies
Scope mouthwash - Day 4
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Scope mouthwash samples after incubation at room temperature for four days (day-4) from Gonbad and Yazd, Iran
Group 0 sample size Number of subjects in the control (unexposed) group
70
Group 1 sample size Number of subjects in the case (exposed) group
55

Lab analysis

Statistical Analysis

Alpha Diversity

Shannon Estimator of species richness and species evenness: more weight on species richness
unchanged
Richness Number of species
unchanged
Faith Phylogenetic diversity, takes into account phylogenetic distance of all taxa identified in a sample
unchanged

Signature 1

Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/07/23

Curator: Scholastica

Revision editor(s): Scholastica

Source: Additional files 2 Table S6

Description: Differential abundance analysis of phylum and genus level changes comparing Scope mouthwash samples after incubation at room temperature for four days (day-4) to frozen immediately (day-0) from Gonbad and Yazd, Iran

Abundance in Group 1: increased abundance in Scope mouthwash - Day 4

NCBI Quality ControlLinks
Bacillota
Actinomycetaceae
Bifidobacterium
Streptococcus
Peptococcus
uncultured Oscillospiraceae bacterium
Solobacterium
Selenomonas 3Selenomonas 3
Veillonellaceae
Lautropia
Pseudomonas

Revision editor(s): Scholastica

Signature 2

Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/07/23

Curator: Scholastica

Revision editor(s): Scholastica

Source: Additional files 2 Table S6

Description: Differential abundance analysis of phylum and genus level changes comparing Scope mouthwash samples after incubation at room temperature for four days (day-4) to frozen immediately (day-0) from Gonbad and Yazd, Iran

Abundance in Group 1: decreased abundance in Scope mouthwash - Day 4

NCBI Quality ControlLinks
Pseudomonadota
Rothia
Porphyromonas
Alloprevotella
Prevotella 7Prevotella 7
Gemella
Neisseria
Aggregatibacter
Haemophilus

Revision editor(s): Scholastica

Experiment 4


Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/07/23

Curator: Scholastica

Revision editor(s): Scholastica

Differences from previous experiment shown

Subjects

Group 0 name Corresponds to the control (unexposed) group for case-control studies
OMNIgene ORAL kit
Group 1 name Corresponds to the case (exposed) group for case-control studies
Scope mouthwash
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Scope mouthwash oral samples from Gonbad and Yazd, Iran
Group 0 sample size Number of subjects in the control (unexposed) group
77
Group 1 sample size Number of subjects in the case (exposed) group
125

Lab analysis

Statistical Analysis

Alpha Diversity

Shannon Estimator of species richness and species evenness: more weight on species richness
unchanged
Richness Number of species
unchanged
Faith Phylogenetic diversity, takes into account phylogenetic distance of all taxa identified in a sample
unchanged

Signature 1

Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/07/23

Curator: Scholastica

Revision editor(s): Scholastica

Source: Additional files 2 Table S8

Description: Differential abundance analysis of phylum and genus level changes comparing OMNIgene ORAL kit samples to Scope mouthwash oral samples from Gonbad and Yazd, Iran

Abundance in Group 1: increased abundance in Scope mouthwash

NCBI Quality ControlLinks
Abiotrophia
Alloscardovia
Bacteroidota
Campylobacter
Campylobacterota
Capnocytophaga
Gemella
Geobacillus
Lactobacillus
Lautropia
Patescibacteria group
Phocaeicola
Pseudomonas
Scardovia
Selenomonas
Spirochaetota
Veillonellaceae
uncultured Oscillospiraceae bacterium
Prevotella 6Prevotella 6
Selenomonas 3Selenomonas 3
candidate division SR1 bacterium MGEHA
Treponema 2Treponema 2

Revision editor(s): Scholastica

Signature 2

Reviewed Marked as Reviewed by Svetlana up on 2024-7-24

Curated date: 2024/07/23

Curator: Scholastica

Revision editor(s): Scholastica

Source: Additional files 2 Table S8

Description: Differential abundance analysis of phylum and genus level changes comparing OMNIgene ORAL kit samples to Scope mouthwash oral samples from Gonbad and Yazd, Iran

Abundance in Group 1: decreased abundance in Scope mouthwash

NCBI Quality ControlLinks
Pseudomonadota
Rothia
Alloprevotella
[Eubacterium] brachy
[Eubacterium] nodatum
Butyrivibrio 2Butyrivibrio 2
Catonella
Lachnoanaerobaculum
Oribacterium
Solobacterium
Fusobacterium
Neisseria
Actinobacillus
Aggregatibacter
Haemophilus

Revision editor(s): Scholastica