Name: Faecalicatena contorta (Prévot 1947) Sakamoto et al. 2017

Category: Species

Proposed as: comb. nov.

Basonym: "Catenabacterium contortum" Prévot 1947

Etymology: con.tor’ta. L. fem. part. adj. contorta, twisted

Pronunciation (Latin), gender: … kon-TOR-ta, feminine

Type strain: 113 VI; ATCC 25540; CCUG 52236; DSM 3982; JCM 6483

Conduct genome-based taxonomy at

16S rRNA gene: LC071803 Analyse FASTA

Valid publication: Sakamoto M, Iino T, Ohkuma M. Faecalimonas umbilicata gen. nov., sp. nov., isolated from human faeces, and reclassification of Eubacterium contortum, Eubacterium fissicatena and Clostridium oroticum as Faecalicatena contorta gen. nov., comb. nov., Faecalicatena fissicatena comb. nov. and Faecalicatena orotica comb. nov. Int J Syst Evol Microbiol 2017; 67:1219-1227. 🇯🇵

IJSEM list: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 67, part 5 of the IJSEM. Int J Syst Evol Microbiol 2017; 67:2495-2498.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Synonyms:

  • Name	Kind
    "Catenabacterium contortum" Prévot 1947	homotypic synonym, not validly published, basonym of name in Approved Lists
    Eubacterium contortum (Prévot 1947) Holdeman et al. 1971 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Faecalicatena Sakamoto et al. 2017. Publication: Sakamoto M, Iino T, Ohkuma M. Faecalimonas umbilicata gen. nov., sp. nov., isolated from human faeces, and reclassification of Eubacterium contortum, Eubacterium fissicatena and Clostridium oroticum as Faecalicatena contorta gen. nov., comb. nov., Faecalicatena fissicatena comb. nov. and Faecalicatena orotica comb. nov. Int J Syst Evol Microbiol 2017; 67:1219-1227. 🇯🇵
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human pathogen". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2. — 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 4 times in PubMed until 2025-06-04.
  • 🙆 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 the species itself.
  • 🧍 According to Bartlett et al. (2022), this species is an established human pathogen. Publication: Bartlett A, Padfield D, Lear L, Bendall R, Vos M. A comprehensive list of bacterial pathogens infecting humans. Microbiology (Reading) 2022; 168:0. 🇬🇧

Parent taxon: Faecalicatena Sakamoto et al. 2017

Assigned by: Sakamoto M, Iino T, Ohkuma M. Faecalimonas umbilicata gen. nov., sp. nov., isolated from human faeces, and reclassification of Eubacterium contortum, Eubacterium fissicatena and Clostridium oroticum as Faecalicatena contorta gen. nov., comb. nov., Faecalicatena fissicatena comb. nov. and Faecalicatena orotica comb. nov. Int J Syst Evol Microbiol 2017; 67:1219-1227. 🇯🇵

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Record number: 795294