Name: Tissierella praeacuta (Tissier 1908) Collins and Shah 1986

Category: Species

Proposed as: comb. nov.

Basonym: "Coccobacillus praeacutus" Tissier 1908

Etymology: prae.a.cu’ta. L. fem. adj. praeacuta, sharpened to a point, sharpened

Pronunciation (Latin), gender: … pra͡e-a-KU-ta, feminine

Type strain: ATCC 25539; CCUG 27825; LMG 8203; NCIMB 703038; NCTC 11158

Conduct genome-based taxonomy at

16S rRNA gene: X80833 Analyse FASTA

Valid publication: Collins MD, Shah HN. Reclassification of Bacteroides praeacutus Tissier (Holdeman and Moore) in a new genus, Tissierella, as Tissierella praeacuta comb. nov. Int. J. Syst. Bacteriol. 1986; 36:461-463. 🇬🇧

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Synonyms:

  • Name	Kind
    "Coccobacillus praeacutus" Tissier 1908	homotypic synonym, not validly published, basonym of name in Approved Lists
    Clostridium hastiforme MacLennan 1939 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP
    "Fusobacterium praeacutum" (Tissier 1908) Hoffman 1957	homotypic synonym, not validly published
    Bacteroides praeacutus (Tissier 1908) Holdeman and Moore 1970 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Emendations:
  • Alauzet et al. 2014 Alauzet C, Marchandin H, Courtin P, Mory F, Lemee L, Pons JL, Chapot-Chartier MP, Lozniewski A, Jumas-Bilak E. Multilocus analysis reveals diversity in the genus Tissierella: description of Tissierella carlieri sp. nov. in the new class Tissierellia classis nov. Syst Appl Microbiol 2014; 37:23-34. 🇫🇷 Oren A, Garrity GM. List of changes in taxonomic opinion no. 21. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2015; 65:7-10.

• Notes:
  • 🥇 Nomenclatural type of the genus Tissierella Collins and Shah 1986. Publication: Collins MD, Shah HN. Reclassification of Bacteroides praeacutus Tissier (Holdeman and Moore) in a new genus, Tissierella, as Tissierella praeacuta comb. nov. Int. J. Syst. Bacteriol. 1986; 36:461-463. 🇬🇧
  • ⏰ According to Bä et al. (2004), this species is an earlier heterotypic synonym of Clostridium hastiforme MacLennan 1939 (Approved Lists 1980). Publication: Bae JW, Park JR, Chang YH, Rhee SK, Kim BC, Park YH. Clostridium hastiforme is a later synonym of Tissierella praeacuta. Int J Syst Evol Microbiol 2004; 54:947-949. 🇰🇷
  • 😷 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 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 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 = 2, note = "ht". — 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 19 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: Tissierella Collins and Shah 1986

Assigned by: Collins MD, Shah HN. Reclassification of Bacteroides praeacutus Tissier (Holdeman and Moore) in a new genus, Tissierella, as Tissierella praeacuta comb. nov. Int. J. Syst. Bacteriol. 1986; 36:461-463. 🇬🇧

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Record number: 782797