Name: Haemophilus aegyptius corrig. (Trevisan 1889) Pittman and Davis 1950 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Bacillus aegyptius" Trevisan 1889

Etymology: ae.gyp’ti.us. N.L. masc. adj. aegyptius, Aegyptian

Gender: masculine

Type strain: ATCC 11116; CCUG 25716; CIP 52.129; DSM 21187; NCTC 8502

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: M75044 Analyse FASTA

Effective publication: Pittman M, Davis DJ. Identification of the Koch-Weeks bacillus (Hemophilus aegyptius). J Bacteriol 1950; 59:413-426.

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: 2

• Synonyms:

  • Name	Kind
    "Bacillus aegyptius" Trevisan 1889	homotypic synonym, not validly published, basonym of name in Approved Lists
    Hemophilus aegyptius (Trevisan 1889) Pittman and Davis 1950 (Approved Lists 1980)	other spelling of name, inaccurate spelling

• Notes:
  • 🧬 The phylogenomic assignment score of this taxon is 0.09081 (N = 32).
  • 😷 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. — The risk group for Taiwan has been imported on 2024-11-03. The full classification is: risk group = 2, 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 64 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: Haemophilus corrig. Winslow et al. 1917 (Approved Lists 1980)

Assigned by: Pittman M, Davis DJ. Identification of the Koch-Weeks bacillus (Hemophilus aegyptius). J Bacteriol 1950; 59:413-426.

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Record number: 783934