Name: Proteus myxofaciens Cosenza and Podgwaite 1966 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: my.xo.fa’ci.ens. Gr. fem. n. myxa, mucus slime; L. pres. part. faciens, producing; N.L. masc. part. adj. myxofaciens, slime-producing (bacteria)

Pronunciation: my-xo-FA-ki-ens

Type strain: ATCC 19692; BCRC 12222; CCRC 12222; CCUG 18769; CIP 106872; DSM 4482; JCM 1670; LMG 7876; NCIMB 13273

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: DQ885259 Analyse FASTA

Effective publication: Cosenza BJ, Podgwaite JD. A new species of Proteus isolated from larvae of the gypsy moth Porthetria dispar (L.). Antonie Van Leeuwenhoek 1966; 32:187-191.

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: correct name (and explicitly recommended for medical use)

Risk group: 1

• Synonyms:

  • Name	Kind
    Cosenzaea myxofaciens (Cosenza and Podgwaite 1966) Giammanco et al. 2011	homotypic synonym, validly published under the ICNP

• Notes:
  • 😷 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 = 1, note = "PI?". — 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 8 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 genus.

Parent taxon: Proteus Hauser 1885 (Approved Lists 1980)

Assigned by: Cosenza BJ, Podgwaite JD. A new species of Proteus isolated from larvae of the gypsy moth Porthetria dispar (L.). Antonie Van Leeuwenhoek 1966; 32:187-191.

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Record number: 779877