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Celiac disease

An immune reaction to gluten that damages the lining of the small intestine.

Compared within 2 studies that had both: 51 people with celiac disease and 45 healthy people. 2 genera are less common in people with celiac disease, and 2 more common.

A difference is an association: it doesn’t mean these genera cause, prevent or treat celiac disease. GMrepo reports this group at the genus level only, so these are genera, not species.

Searching opens both lists and shows only matching rows.

Less common in celiac disease · 2

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Romboutsia genus in 2 studies Healthy 70% celiac disease 35%
  2. Agathobacter genus in 2 studies Healthy 69% celiac disease 43%

More common in celiac disease · 2

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Weissella genus in 2 studies Healthy 7.5% celiac disease 39%
  2. Veillonella genus in 2 studies Healthy 16% celiac disease 51%

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 China, India.
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 · 89 genera

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

No meaningful difference · 89
PubMed · human studies and reviews first

Recent research

All research on it
  1. Observational World journal of gastroenterology · 2026
    Gut bacterial and fungal signatures in relation to human leukocyte antigen-DQ2/DQ8 in children with celiac disease and siblings.
    PubMed ↗
  2. Review Molecular nutrition & food research · 2025
    Bifidobacteria and Celiac Disease: Mechanisms of Probiotic Action in Reducing Gluten-Induced Cytotoxicity and Inflammation.
    PubMed ↗
  3. Randomized trial Arquivos de gastroenterologia · 2025
    PROBIOTICS AS AN ADJUNCTIVE THERAPY FOR CELIAC DISEASE: SYMPTOM RELIEF AND QUALITY OF LIFE IMPROVEMENT.
    PubMed ↗
  4. Observational Clinical gastroenterology and hepatology · 2024
    One Year of Gluten-Free Diet Impacts Gut Function and Microbiome in Celiac Disease.
    PubMed ↗
  5. Observational Gut microbes · 2023
    Gluten-free diet affects fecal small non-coding RNA profiles and microbiome composition in celiac disease supporting a host-gut microbiota crosstalk.
    PubMed ↗

Source: PubMed, U.S. National Library of Medicine · 29 linked papers, last 10 years