Name: Fusobacterium prausnitzii (Hauduroy et al. 1937) Moore and Holdeman 1970 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Bacteroides praussnitzii" Hauduroy et al. 1937

Etymology: praus.nitz’i.i. N.L. gen. masc. n. prausnitzii, of Prausnitz, named for C. Prausnitz, the bacteriologist who first isolated this organism

Gender: neuter

Type strain: ATCC 27768; NCIMB 13872

Conduct genome-based taxonomy at

16S rRNA gene: AJ413954 Analyse FASTA

Effective publication: Moore WEC, Holdeman LV. Fusobacterium. In: Cato EP, Cummins CS, Holdeman LV, Johnson JL, Moore WEC, Smibert RM, Smith LDS (eds), Outline of Clinical Methods in Anaerobic Bacteriology, 2nd revision, Virginia Polytechnic Institute - Anaerobe Laboratory, Blacksburg/Virginia, 1970, p. 45-51.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Faecalibacterium prausnitzii (Hauduroy et al. 1937) Duncan et al. 2002

Risk group: 2

• Synonyms:

  • Name	Kind
    Faecalibacterium prausnitzii (Hauduroy et al. 1937) Duncan et al. 2002	homotypic synonym, validly published under the ICNP
    "Faecalibacterium moorei" Fitzgerald et al. 2018	homotypic synonym, not validly published
    "Bacteroides praussnitzii" Hauduroy et al. 1937	homotypic synonym, not validly published, basonym of name in Approved Lists

• Notes:
  • 😩 Deposits incorrectly indicated in some sources as representing the type strain of this taxon: DSM 17677; JCM 31915.
  • ❗ Fusobacterium prausnitzii is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Fusobacterium.
  • 😷 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 Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 2. — The risk group for Germany has been imported on 2023-10-29. 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 23 times in PubMed until 2025-06-04.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of the name to be applied to this species. The name is on LoRN because of the recorded risk group of the species itself.
  • 🧍 Fusobacterium prausnitzii (Hauduroy et al. 1937) Moore and Holdeman 1970 (Approved Lists 1980) is not a member of the genus Fusobacterium Knorr 1922 (Approved Lists 1980) [1, 2] but is closer to some Eubacterium species and is located between Clostridium "clusters III and IV" defined by Collins et al. [3]. Publication: Wang RF, Cao WW, Cerniglia CE. Phylogenetic analysis of Fusobacterium prausnitzii based upon the 16S rRNA gene sequence and PCR confirmation. Int J Syst Bacteriol 1996; 46:341-343.
  • 🧍 See also: Publication: Collins MD, Lawson PA, Willems A, Cordoba JJ, Fernandez-Garayzabal J, Garcia P, Cai J, Hippe H, Farrow JA. The phylogeny of the genus Clostridium: proposal of five new genera and eleven new species combinations. Int J Syst Bacteriol 1994; 44:812-826.
  • 🧍 See also: Publication: Zellner G, Stackebrandt E, Nagel D, Messner P, Weiss N, Winter J. Anaerofilum pentosovorans gen. nov., sp. nov., and Anaerofilum agile sp. nov., two new, strictly anaerobic, mesophilic, acidogenic bacteria from anaerobic bioreactors. Int J Syst Bacteriol 1996; 46:871-875.

Parent taxon: Fusobacterium Knorr 1922 (Approved Lists 1980)

Assigned by: Moore WEC, Holdeman LV. Fusobacterium. In: Cato EP, Cummins CS, Holdeman LV, Johnson JL, Moore WEC, Smibert RM, Smith LDS (eds), Outline of Clinical Methods in Anaerobic Bacteriology, 2nd revision, Virginia Polytechnic Institute - Anaerobe Laboratory, Blacksburg/Virginia, 1970, p. 45-51.

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Record number: 783887