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Mycoplasma pneumonia

Compared within 1 study that had both: 81 people with mycoplasma pneumonia and 47 healthy people. 10 genera are less common in people with mycoplasma pneumonia, and 15 more common.

A difference is an association: it doesn’t mean these genera cause, prevent or treat mycoplasma pneumonia. 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 mycoplasma pneumonia · 10

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Parabacteroides genus in 1 study Healthy 96% mycoplasma pneumonia 64%
  2. Faecalibacterium genus in 1 study Healthy 94% mycoplasma pneumonia 62%
  3. Haemophilus genus in 1 study Healthy 43% mycoplasma pneumonia 9.9%
  4. Lachnospira genus in 1 study Healthy 40% mycoplasma pneumonia 9.9%
  5. Romboutsia genus in 1 study Healthy 43% mycoplasma pneumonia 12%

More common in mycoplasma pneumonia · 15

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Actinomyces genus in 1 study Healthy 2.1% mycoplasma pneumonia 67%
  2. Gemella genus in 1 study Healthy 0% mycoplasma pneumonia 47%
  3. Rhodococcus genus in 1 study Healthy 0% mycoplasma pneumonia 42%
  4. Rothia genus in 1 study Healthy 0% mycoplasma pneumonia 36%
  5. Atopobium genus in 1 study Healthy 0% mycoplasma pneumonia 33%

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 · 48 genera

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

No meaningful difference · 48
PubMed · human studies and reviews first

Recent research

All research on it
  1. Animal study BMC microbiology · 2026
    Attenuated efficacy of Streptococcus salivarius K12 against Mycoplasma pneumoniae infection in mice.
    PubMed ↗
  2. Frontiers in cellular and infection microbiology · 2025
    Characteristics of lower respiratory microbiota in children's refractory Mycoplasma pneumoniae pneumonia pre- and post-COVID-19 era.
    PubMed ↗
  3. Animal study Nan fang yi ke da xue xue bao = Journal of Southern Medical University · 2024
    [Protective effect of Streptococcus salivarius K12 against Mycoplasma pneumoniae infection in mice].
    PubMed ↗
  4. Biomedical and environmental sciences · 2022
    Using 16S rDNA Sequencing Technology to Preliminarily Analyze Intestinal Flora in Children with Mycoplasma pneumoniae Pneumonia.
    PubMed ↗

Source: PubMed, U.S. National Library of Medicine · 4 linked papers, last 10 years