Name: Haemophilus aphrophilus Khairat 1940 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: a.phro.phi.lus. Gr. masc. n. aphros, foam; N.L. adj. philus -a -um, friend, loving; from Gr. adj. philos -ê -on, loving; N.L. masc. adj. aphrophilus, foam loving

Gender: masculine

Type strain: ATCC 33389; CCUG 3715; CIP 70.73; NCTC 5906

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: EU083529 Analyse FASTA

Effective publication: Khairat O. Endocarditis due to new species of Haemophilus. Journal of Pathology and Bacteriology 1940; 50:497-505.

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

Correct name: Aggregatibacter aphrophilus (Khairat 1940) Nørskov-Lauritsen and Kilian 2006

Risk group: 2

• Synonyms:

  • Name	Kind
    Haemophilus paraphrophilus Zinnemann et al. 1968 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP
    Aggregatibacter aphrophilus (Khairat 1940) Nørskov-Lauritsen and Kilian 2006	homotypic synonym, validly published under the ICNP

• Notes:
  • According to Noerskov-Lauritsen and Kilian (2006), this species is an earlier heterotypic synonym of Haemophilus paraphrophilus Zinnemann et al. 1968 (Approved Lists 1980). Publication: Norskov-Lauritsen N, Kilian M. Reclassification of Actinobacillus actinomycetemcomitans, Haemophilus aphrophilus, Haemophilus paraphrophilus and Haemophilus segnis as Aggregatibacter actinomycetemcomitans gen. nov., comb. nov., Aggregatibacter aphrophilus comb. nov. and Aggregatibacter segnis comb. nov., and emended description of Aggregatibacter aphrophilus to include V factor-dependent and V factor-independent isolates. Int J Syst Evol Microbiol 2006; 56:2135-2146.
  • Haemophilus aphrophilus is the correct name 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 Haemophilus.
  • 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 2022; 168:0.

Parent taxon: Haemophilus corrig. Winslow et al. 1917 (Approved Lists 1980)

Assigned by: Khairat O. Endocarditis due to new species of Haemophilus. Journal of Pathology and Bacteriology 1940; 50:497-505.

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Record number: 787104