Name: Proteus morganii (Winslow et al. 1919) Yale 1939 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Bacillus morgani" Winslow et al. 1919

Etymology: mor.ga’ni.i. N.L. gen. masc. n. morganii, of Morgan, named after H. de R. Morgan, a British bacteriologist who first studied the organism

Pronunciation: mor-GA-ni-i

Type strain: ATCC 25830; ATCC 8076-H; CCUG 6328; CIP 103763; CIP A231; DSM 30164; IFO 3848; JCM 1672; LMG 7874; NBIMCC 1392; NBRC 3848; NCCB 73065; NCTC 235

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ301681 Analyse FASTA

Effective publication: Yale MW. Genus VI. Proteus Hauser. In: Bergey DH, Breed RS, Murray EGD, Hitchens AP (eds), Bergey's Manual of Determinative Bacteriology, 5th ed., The Williams & Wilkins Co, Baltimore, 1939, p. 430-436.

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: Morganella morganii (Winslow et al. 1919) Fulton 1943 (Approved Lists 1980)

Risk group: 2

• Synonyms:

  • Name	Kind
    Morganella morganii (Winslow et al. 1919) Fulton 1943 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP
    "Bacillus morgani" Winslow et al. 1919	homotypic synonym, not validly published, basonym of name in Approved Lists

• Notes:
  • ❗ Proteus morganii 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 Proteus.
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human and animal pathogen - biological class of risk animal: 2". — 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". — The risk group for United Kingdom has been imported on 2024-01-31. The full classification is: risk group = 2. — 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 175 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.

Parent taxon: Proteus Hauser 1885 (Approved Lists 1980)

Assigned by: Yale MW. Genus VI. Proteus Hauser. In: Bergey DH, Breed RS, Murray EGD, Hitchens AP (eds), Bergey's Manual of Determinative Bacteriology, 5th ed., The Williams & Wilkins Co, Baltimore, 1939, p. 430-436.

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Record number: 779876