Name: Sneathia sanguinegens Collins et al. 2002

Category: Species

Proposed as: sp. nov.

Etymology: san.guin’e.gens. L. masc. n. sanguis, blood; L. pres. part. egens, needing; N.L. fem. part. adj. sanguinegens, needing blood, because the organism needs blood or serum

Pronunciation (Latin), gender: sne-A-t^hi-a san-GU͡IN-e-gens, feminine

Type strain: CCUG 41628; CIP 106906; DSM 22970

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ344093 Analyse FASTA

Effective publication: Collins MD, Hoyles L, Tornqvist E, von Essen R, Falsen E. Characterization of some strains from human clinical sources which resemble "Leptotrichia sanguinegens": description of Sneathia sanguinegens sp. nov., gen. nov. Syst Appl Microbiol 2001; 24:358-361. 🇬🇧

IJSEM list: Anonymous. Validation list no. 85. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2002; 52:685-690.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Notes:
  • 🥇 Nomenclatural type of the genus Sneathia Collins et al. 2002. Publication: Collins MD, Hoyles L, Tornqvist E, von Essen R, Falsen E. Characterization of some strains from human clinical sources which resemble "Leptotrichia sanguinegens": description of Sneathia sanguinegens sp. nov., gen. nov. Syst Appl Microbiol 2001; 24:358-361. 🇬🇧
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 2". — The risk group for Germany has been imported on 2026-08-13. 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 47 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 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: Sneathia Collins et al. 2002

Assigned by: Collins MD, Hoyles L, Tornqvist E, von Essen R, Falsen E. Characterization of some strains from human clinical sources which resemble "Leptotrichia sanguinegens": description of Sneathia sanguinegens sp. nov., gen. nov. Syst Appl Microbiol 2001; 24:358-361. 🇬🇧

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Record number: 784912