Name: Actinobacillus equuli subsp. haemolyticus Christensen et al. 2002

Category: Subspecies

Proposed as: subsp. nov.

Etymology: hae.mo.ly’ti.cus. Gr. neut. n. haîma, blood; Gr. masc. adj. lytikos, loosening, dissolving; N.L. masc. adj. haemolyticus, blood-dissolving

Gender: masculine

Type strain: CCUG 19799; DSM 22436; F 154; NCTC 13195

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF247716 Analyse FASTA

Valid publication: Christensen H, Bisgaard M, Olsen JE. Reclassification of equine isolates previously reported as Actinobacillus equuli, variants of A. equuli, Actinobacillus suis or Bisgaard taxon 11 and proposal of A. equuli subsp. equuli subsp. nov. and A. equuli subsp. haemolyticus subsp. nov. Int J Syst Evol Microbiol 2002; 52:1569-1576.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 52, part 5 of the IJSEM. Int J Syst Evol Microbiol 2003; 53:3-5.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 2

• Notes:
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 2 - 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 = "t".
  • 🧍 Actinobacillus equuli subsp. haemolyticus Christensen et al. 2002 was previously known as Bisgaard taxon 11. Publication: Bisgaard M. Isolation and characterization of some previously unreported taxa from poultry with phenotypical characters related to Actinobacillus-an Pasteurella species. Acta Pathol Microbiol Immunol Scand B 1982; 90:59-67.

Parent taxon: Actinobacillus equuli (van Straaten 1918) Haupt 1934 (Approved Lists 1980)

Assigned by: Christensen H, Bisgaard M, Olsen JE. Reclassification of equine isolates previously reported as Actinobacillus equuli, variants of A. equuli, Actinobacillus suis or Bisgaard taxon 11 and proposal of A. equuli subsp. equuli subsp. nov. and A. equuli subsp. haemolyticus subsp. nov. Int J Syst Evol Microbiol 2002; 52:1569-1576.

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Record number: 783279