Anaerotruncus massiliensis (ex Togo et al. 2019)
What's this?
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Its ID gene: the stretch scientists read to tell microbes apart. Each bar is one letter of its DNA. Every species has its own order of letters, so the pattern works like a fingerprint. Close relatives share most of it.
16S rRNA gene, V4 region: the 252 letters between the standard primers (515F/806R), which are the same in every species. One reference sequence; strains can differ by a letter or two. NCBI NR_179417.1
NCBI now calls it Anaerotruncus massiliensis.
No reference genome in NCBI yet Data sources
What it can do
Not seen in its lab tests: ferment fiber.
All 13 capabilities and their evidence
| Capability | Verdict | Genome analysis | Lab tests | Published research |
|---|---|---|---|---|
| Can ferment fiber | Not seen | — | 0 of 1 strain · strip test | No papers |
| Can make butyrate | Not checked | — | — | No papers |
| Can make propionate | Not checked | — | — | No papers |
| Can make lactic acid | Not checked | — | — | No papers |
| Can eat inulin | Not checked | — | — | No papers |
| Can eat resistant starch | Not checked | — | — | No papers |
| Can eat pectin | Not checked | — | — | No papers |
| Can use lactose | Not checked | — | — | No papers |
| Can feed on gut mucus | Not checked | — | — | No papers |
| Can change bile acids | Not checked | — | — | No papers |
| Can make B vitamins | Not checked | — | — | No papers |
| Can make hydrogen sulfide | Not checked | — | — | No papers |
| Can make methane | Not checked | — | — | No papers |
AGORA2 (Heinken et al. 2023) via VMH, CC BY 4.0 · BacDive (DSMZ), CC BY 4.0 · NJC19 (Lim et al., Scientific Data 2020), CC0
In healthy guts
Found in 7.6% of healthy people.
- largest Segatella copri 6.2%
- 2nd largest Phocaeicola vulgatus 5.0%
- 3rd largest Faecalibacterium prausnitzii 4.7%
- 4th largest Bacteroides uniformis 3.2%
- 5th largest Agathobacter rectalis 2.5%
- 6th largest Alistipes putredinis 2.3%
- 7th largest Bifidobacterium longum 2.1%
- 8th largest Ruminococcus bromii 1.8%
- Anaerotruncus massiliensis (ex Togo et al. 2019) under 0.01%
- 2,169 other microbes, each a sliver 56.7%
- 15.6%
On average, a sliver, under 0.01% of the microbes in a healthy gut.
Every group, drawn the same way. Only some samples record age or sex, so each group says how many people it comes from. Tap one to see it above.
In conditions
Compared with healthy people in the same studies, it’s less common in 1 condition and more common in 1 condition. Only studies that had both are counted.
A difference is an association: it doesn’t mean this microbe causes, prevents or treats any of these.
Strongest first, then the biggest gap · Each figure is 10 peopleIn studies of how people live
Higher in omnivores than vegans
Fackelmann 2025 · 21,561 people Landmark study
Higher in 5 of 5 cohorts
“Higher” is the study’s measure: on average, a bigger share of gut bacteria across everyone in the group, carriers or not. It isn’t how many people carry it. An association the authors report, measured once per person. It doesn’t mean a diet changes this microbe, or that the microbe affects health.