Name: Klebsiella ornithinolytica Sakazaki et al. 1989

Category: Species

Proposed as: sp. nov.

Etymology: or.ni.thi.no.ly.ti.ca. N.L. fem. n. ornithina, ornithine, an amino acid; N.L. fem. adj. lytica, able to loose, able to dissolve; from Gr. fem. adj. lytikê, able to loosen; N.L. fem. adj. ornithinolytica, ornithine dissolving

Gender: feminine

Type strain: ATCC 31898; CCUG 26769; CIP 103364; CIP 103576; DSM 7464; JCM 6096; NIH 90-72

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ251467 Analyse FASTA

Effective publication: Sakazaki R, Tamura K, Kosako Y, Yoshizaki E. Klebsiella ornithinolytica sp. nov., formerly known as ornithine-positive Klebsiella oxytoca. Curr. Microbiol. 1989; 18:201-206.

IJSEM list: Anonymous. Validation list no. 31. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1989; 39:495-497.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 2

• Synonyms:

  • Name	Kind
    Raoultella ornithinolytica (Sakazaki et al. 1989) Drancourt et al. 2001	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". — 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.
  • 🎓 Name mentioned 29 times in PubMed until 2024-03-27.
  • 🧍 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.
  • 🧍 Klebsiella ornithinolytica Sakazaki et al. 1989 was previously known as ornithine-positive Klebsiella oxytoca. Publication: Lautrop H. Gelatin-liquefying Klebsiella strains (Bacterium oxytocum (Flugge) ). Acta Pathol Microbiol Scand 1956; 39:375-384.

Parent taxon: Klebsiella Trevisan 1885 (Approved Lists 1980)

Assigned by: Sakazaki R, Tamura K, Kosako Y, Yoshizaki E. Klebsiella ornithinolytica sp. nov., formerly known as ornithine-positive Klebsiella oxytoca. Curr. Microbiol. 1989; 18:201-206.

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Record number: 777148