Species ***Clostridium* *piliforme***

Name: Clostridium piliforme (ex Tyzzer 1917) Duncan et al. 1993

Category: Species

Proposed as: sp. nov., nom. rev.

Etymology: pi.li.for’me. L. masc. n. pilus, a hair; L. neut. adj. suff. -forme, of the shape of; N.L. neut. adj. piliforme, hair-shaped

Pronunciation (Latin), gender: … pi-li-FOR-me, neuter

Type strain: not given

Valid publication: Duncan AJ, Carman RJ, Olsen GJ, Wilson KH. Assignment of the agent of Tyzzer's disease to Clostridium piliforme comb. nov. on the basis of 16S rRNA sequence analysis. Int J Syst Bacteriol 1993; 43:314-318.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 43, part 2 of the IJSB. Int J Syst Bacteriol 1993; 43:625.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

Synonyms:

Name	Kind
"Tyzzerella piliformis" (Duncan et al. 1993 ex Tyzzer 1917) Yutin and Galperin 2013	homotypic synonym, not validly published

Notes:
- 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 1, note = "animal pathogen - biological class of risk animal: 2". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 2, note = "PV". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2, note = "t". — 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 58 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), no evidence of human infection was found for this species. Publication: Bartlett A, Padfield D, Lear L, Bendall R, Vos M. A comprehensive list of bacterial pathogens infecting humans. Microbiology (Reading) 2022; 168:0. 🇬🇧
- 🧍 According to Yarza et al. (2013), an "un-sequenced orphan species where descriptions, illustrations or dead preserved material serve as the type. Organism may be maintained in mammalian cell lines.". Publication: Yarza P, Sproer C, Swiderski J, Mrotzek N, Spring S, Tindall BJ, Gronow S, Pukall R, Klenk HP, Lang E, et al. Sequencing orphan species initiative (SOS): Filling the gaps in the 16S rRNA gene sequence database for all species with validly published names. Syst Appl Microbiol 2013; 36:69-73. 🇩🇪
- 🧍 In violation of Rule 34a, Duncan et al. 1993 propose Clostridium piliforme as a new combination. — The name Clostridium piliforme is not validly published because no type strain is designated [Rule 27(3), Rule 30]. — 🧍 The name Clostridium piliforme is not validly published because no type strain is designated; see Rule 27(3), Rule 30. Publication: Oren A, Arahal DR, Goker M, Moore ERB, Rossello-Mora R, Sutcliffe IC. International Code of Nomenclature of Prokaryotes. Prokaryotic Code (2022 Revision). Int J Syst Evol Microbiol 2023; 73:5585. 🇮🇱
- 🧍 Nom. rev. / basonym "Bacillus piliformis". Publication: Cohn F. Untersuchungen über Bakterien. In: Cohn F (eds), Beiträge zur Biologie der Pflanzen 1 (Heft 2), 1872, Max Müller, Breslau, 1875, p. 127-224.

Parent taxon: Clostridium Prazmowski 1880 (Approved Lists 1980)

Assigned by: Duncan AJ, Carman RJ, Olsen GJ, Wilson KH. Assignment of the agent of Tyzzer's disease to Clostridium piliforme comb. nov. on the basis of 16S rRNA sequence analysis. Int J Syst Bacteriol 1993; 43:314-318.

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Record number: 783671

This LPSN page was printed on 2026-02-19 03:20:35

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Species Clostridium piliforme

Species ***Clostridium* *piliforme***