Species "Coccobacillus ducreyi"

Name: "Coccobacillus ducreyi" Neveu-Lemaire 1921

Category, proposed as: species, sp. nov.

Etymology: du.crey’i. N.L. gen. masc. n. ducreyi, of Ducrey, named after Ducrey, the bacteriologist who first isolated this organism

Pronunciation (Latin), gender: kok-ko-ba-KIL-lus du-KREY-i, masculine

Nomenclatural type: ATCC 33940; CCUG 4438; CIP 54.2; DSM 8925; NCTC 10945

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: M63900 Analyse FASTA

Original publication: Neveu-Lemaire M. Précis de la parasitologie humaine, 5th ed. J. Lemaire, Paris, 1921.

Nomenclatural status: not validly published, basonym of name in Approved Lists

Taxonomic status: synonym (and no standing)

Correct name: Haemophilus ducreyi (Neveu-Lemaire 1921) Bergey et al. 1923 (Approved Lists 1980)

Risk group: 2

• Synonyms:

  • Name	Kind
    "Pseudactinobacillus ducreyi" (Neveu-Lemaire 1921) Segui et al. 2026	homotypic synonym, not validly published
    Haemophilus ducreyi (Neveu-Lemaire 1921) Bergey et al. 1923 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Notes:
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human pathogen". — 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". — 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.

Parent taxon: [Coccobacillus]

Assigned by: Neveu-Lemaire M. Précis de la parasitologie humaine, 5th ed. J. Lemaire, Paris, 1921.

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Record number: 4406