Name: Collinsella intestinalis Kageyama and Benno 2000

Category: Species

Proposed as: sp. nov.

Etymology: in.tes.ti.na’lis. N.L. fem. adj. intestinalis, pertaining to the intestine

Pronunciation (Latin), gender: kol-lin-SEL-la in-tes-ti-NA-lis, feminine

Type strain: CCUG 45296; CIP 106914; DSM 13280; JCM 10643; RCA56-68

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB558489 Analyse FASTA

Valid publication: Kageyama A, Benno Y. Emendation of genus Collinsella and proposal of Collinsella stercoris sp. nov. and Collinsella intestinalis sp. nov. Int J Syst Evol Microbiol 2000; 50:1767-1774. 🇯🇵

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 50, part 5 of the IJSEM. Int J Syst Evol Microbiol 2000; 50:1955.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name (and explicitly recommended for medical use)

Risk group: 1

• Emendations:
  • Nouioui et al. 2018 Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007. 🇩🇪 Oren A, Garrity GM. List of changes in taxonomic opinion no. 29. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2019; 69:13-32.

• Notes:
  • 😢 The terminology used by the authors is in line with many other taxonomic studies and does not negatively affect their main results; some improvements may nevertheless be possible. Using the term "phylogenetic data" (or equivalent) for sequence data is not advocated. Whether taxa can have "members" is debatable. See the LPSN phylogeny page for details. Publication: Göker M. What can genome analysis offer for bacteria? In: Bridge P, Smith D, Stackebrandt E (eds), Trends in the systematics of bacteria and fungi, CAB International, Wallingford, 2021, p. 255-281. 🇬🇧
  • 🧬 The phylogenomic assignment score of this taxon is 0.01397 (N = 1).
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 1. — The risk group for Taiwan has been imported on 2024-11-03. The full classification is: risk group = 1, note = "P650 = v". — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🎓 Name mentioned 8 times in PubMed until 2026-06-11.
  • 🙆 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as the name to be applied to this species. The name is on LoRN because of the recorded risk group of other species in the genus.
  • 🧍 According to Bartlett et al. (2022), this species was isolated from feces in healthy individuals. Publication: Bartlett A, Padfield D, Lear L, Bendall R, Vos M. A comprehensive list of bacterial pathogens infecting humans. Microbiology (Reading) 2022; 168:0. 🇬🇧
  • 🧍 On page 1768, the type strain is erroneously cited as strain JCM 10646 (strain JCM 10646 is a strain of Solobacterium moorei Kageyama and Benno 2000). Publication: Kageyama A, Benno Y. Phylogenic and phenotypic characterization of some Eubacterium-like isolates from human feces: description of Solobacterium moorei Gen. Nov., Sp. Nov. Microbiol Immunol 2000; 44:223-227. 🇯🇵

Parent taxon: Collinsella Kageyama et al. 1999

Assigned by: Kageyama A, Benno Y. Emendation of genus Collinsella and proposal of Collinsella stercoris sp. nov. and Collinsella intestinalis sp. nov. Int J Syst Evol Microbiol 2000; 50:1767-1774. 🇯🇵

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Record number: 775056