Species Clostridium irregulare

Name: Clostridium irregulare corrig. (Choukévitch 1911) Prévot 1938 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Bacillus irregularis" Choukévitch 1911

Etymology: ir.re.gu.la’re. L. neut. adj. irregulare, irregular, referring to pleomorphic, irregular cells

Gender: neuter

Type strain: ATCC 25756; DSM 2635; JCM 1425

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: X73447 Analyse FASTA

Effective publication: Prévot AR. Études de systématique bactérienne. IV. Critique de la conception actuelle du genre Clostridium. Annales de l'Institut Pasteur (Paris) 1938; 61:72-91.

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: Asaccharospora irregularis (Choukévitch 1911) Gerritsen et al. 2014

Risk group: 1

Synonyms:

Name	Kind
Clostridium irregularis (Choukévitch 1911) Prévot 1938 (Approved Lists 1980)	other spelling of name, inaccurate spelling
Asaccharospora irregularis (Choukévitch 1911) Gerritsen et al. 2014	homotypic synonym, validly published under the ICNP
"Bacillus irregularis" Choukévitch 1911	homotypic synonym, not validly published, basonym of name in Approved Lists

Notes:
- ❗ Clostridium irregulare 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 Clostridium.
- 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1. — 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 2 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 genus.
- 🧍 The original spelling Clostridium irregularis (sic), has been corrected by Cato et al. 1986. Publication: Cato EP, George WL, Finegold SM. Genus Clostridium Prazmowski 1880, 23AL. In: Sneath PHA, Mair NS, Sharpe ME, Holt JG (eds), Bergey's Manual of Systematic Bacteriology, first edition, vol. 2, The Williams & Wilkins Co., Baltimore, 1986, p. 1141-1200.
- 🧍 The original spelling, Clostridium irregularis (sic), has been corrected by Cato et al. 1986. Publication: Cato EP, George WL, Finegold SM. Genus Clostridium Prazmowski 1880, 23AL. In: Sneath PHA, Mair NS, Sharpe ME, Holt JG (eds), Bergey's Manual of Systematic Bacteriology, first edition, vol. 2, The Williams & Wilkins Co., Baltimore, 1986, p. 1141-1200.

Parent taxon: Clostridium Prazmowski 1880 (Approved Lists 1980)

Assigned by: Prévot AR. Études de systématique bactérienne. IV. Critique de la conception actuelle du genre Clostridium. Annales de l'Institut Pasteur (Paris) 1938; 61:72-91.

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Record number: 774904

This LPSN page was printed on 2025-06-23 18:12:08

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Species Clostridium irregulare