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Diabetic retinopathy

Compared within 2 studies that had both: 53 people with diabetic retinopathy and 39 healthy people. 1 genus is less common in people with diabetic retinopathy, and 6 more common.

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

Phylum

Searching opens both lists and shows only matching rows.

Less common in diabetic retinopathy · 1

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 67% diabetic retinopathy 30%

More common in diabetic retinopathy · 6

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Eisenbergiella genus in 2 studies Healthy 0% diabetic retinopathy 23%
  2. Cloacibacillus genus in 2 studies Healthy 0% diabetic retinopathy 19%
  3. Butyricimonas genus in 2 studies Healthy 2.1% diabetic retinopathy 26%
  4. Alistipes genus in 2 studies Healthy 21% diabetic retinopathy 59%
  5. Parabacteroides genus in 2 studies Healthy 25% diabetic retinopathy 60%

As many carry these · 2 the amount differs

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Faecalibacterium genus in 2 studies Healthy 86% diabetic retinopathy 85%

    Carriers have about half as much, in 2 of 2 studies (5.0% → 2.0% of their gut microbes).

  2. Blautia genus in 2 studies Healthy 89% diabetic retinopathy 83%

    Carriers have about half as much, in 2 of 2 studies (5.5% → 2.7% of their gut microbes).

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 · 68 genera

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

No meaningful difference · 68
PubMed · human studies and reviews first

Recent research

All research on it
  1. Meta-analysis International ophthalmology · 2026
    The relationship between diabetic retinopathy and intestinal microbiota: a systematic review and meta analysis.
    PubMed ↗
  2. mSphere · 2026
    Association between ocular surface microbiota species and type 2 diabetes mellitus with or without retinopathy and related clinical parameters.
    PubMed ↗
  3. Meta-analysis BMC ophthalmology · 2026
    The gut-eye axis: microbiota and their role in diabetic retinopathy: a systematic review and meta-analysis.
    PubMed ↗
  4. Review Diabetes research and clinical practice · 2025
    Differential gut microbiome profiles in diabetic retinopathy: A comparative study across continental populations.
    PubMed ↗
  5. Observational Applied microbiology and biotechnology · 2024
    Gut microbiota predict retinopathy in patients with diabetes: A longitudinal cohort study.
    PubMed ↗

Source: PubMed, U.S. National Library of Medicine · 12 linked papers, last 10 years