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← Conditions Digestive system

Diarrhea

Compared within 1 study that had both: 65 people with diarrhea and 10 healthy people. 65 microbes are less common in people with diarrhea, and none more common.

A difference is an association: it doesn’t mean these microbes cause, prevent or treat diarrhea.

Phylum

Searching opens both lists and shows only matching rows.

Less common in diarrhea · 65

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Roseburia hominis in 1 study Healthy 100% diarrhea 6.2%
  2. Waltera acetigignens in 1 study Healthy 100% diarrhea 12%
  3. Odoribacter splanchnicus in 1 study Healthy 100% diarrhea 17%
  4. Coprococcus comes in 1 study Healthy 100% diarrhea 19%
  5. Alistipes onderdonkii in 1 study Healthy 100% diarrhea 22%

More common in diarrhea · 0

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people

None compared.

Where these numbers come from

Studies
Only GMrepo projects that had people with the condition and healthy people, 10 or more of each. Numbers come from those studies, never from pooling.Sampled in Denmark.
How common
The share of people whose sample has any of it, in the people with the condition and in the healthy people of those same studies. Tested within studies (Cochran–Mantel–Haenszel, corrected for testing many microbes); a difference counts when it is clear and meaningful (Cohen’s h of 0.2 or more).
Strength word
Counted by code from how many studies point the same way: Seen again and again (3 or more, none clearly the other way), Seen more than once (2, the majority), Seen once (1, listed last). Where studies disagree, a row isn’t listed.
Each study
Tap a row for every study’s own numbers, and for how much carriers have.
Analysis
Our analysis of GMrepo data. GMrepo on Data sources · Read the rules

Also compared · 37 microbes

Compared within studies that had both, but not listed above.

No meaningful difference · 37
PubMed · human studies and reviews first

Recent research

All research on it
  1. Randomized trial Journal of gastroenterology and hepatology · 2026
    Consolidation Therapy of Probiotics With Rifaximin Prevent Relapse in Rifaximin-Responsive Diarrhea-Predominant Irritable Bowel Syndrome: A Multicenter Randomized Clinical Trial.
    PubMed ↗
  2. Observational BMC microbiology · 2026
    Metagenomic profiling of gut microbiome in post-cholecystectomy patients with diarrhea: a nested case-control study.
    PubMed ↗
  3. Randomized trial International microbiology · 2026
    Bifidobacterium breve PRL2020 mitigates antibiotic-induced gut symptoms and dysbiosis in children treated with amoxicillin or amoxicillin-clavulanate.
    PubMed ↗
  4. Randomized trial Diabetes, obesity & metabolism · 2026
    Bifidobacterium bifidum G9-1 Intake Improves Gastrointestinal Symptoms in Type 2 Diabetes Mellitus: An Open-Label, Randomized Controlled Trial (Binary STAR Study).
    PubMed ↗
  5. Review Archives of microbiology · 2026
    Divergent mechanistic pathways of diarrheagenic bacterial infections at the host-microbiota interface: a review.
    PubMed ↗

Source: PubMed, U.S. National Library of Medicine · 313 linked papers, last 10 years