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← Conditions Kidney, urinary and reproductiveSkin Genus-level

Mastitis

Compared within 1 study that had both: 42 people with mastitis and 44 healthy people. 3 genera are less common in people with mastitis, and none more common.

A difference is an association: it doesn’t mean these genera cause, prevent or treat mastitis. 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 mastitis · 3

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Romboutsia genus in 1 study Healthy 75% mastitis 29%
  2. Clostridium genus in 1 study Healthy 91% mastitis 55%
  3. Monoglobus genus in 1 study Healthy 68% mastitis 36%

More common in mastitis · 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 China.
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. Scientific reports · 2025
    Activity of lactic acid bacteria against biofilms formed by Staphylococcus aureus strains involved in acute mastitis.
    PubMed ↗
  2. Animal study International journal of biological macromolecules · 2024
    Astragalus polysaccharide alleviates mastitis disrupted by Staphylococcus aureus infection by regulating gut microbiota and SCFAs metabolism.
    PubMed ↗
  3. Review World journal of microbiology & biotechnology · 2023
    Lactococcus lactis, a bacterium with probiotic functions and pathogenicity.
    PubMed ↗
  4. Microbiome · 2023
    Sialic acid exacerbates gut dysbiosis-associated mastitis through the microbiota-gut-mammary axis by fueling gut microbiota disruption.
    PubMed ↗
  5. Cell reports · 2022
    Commensal cow Roseburia reduces gut-dysbiosis-induced mastitis through inhibiting bacterial translocation by producing butyrate in mice.
    PubMed ↗

Source: PubMed, U.S. National Library of Medicine · 9 linked papers, last 10 years