Name: Raoultella ornithinolytica (Sakazaki et al. 1989) Drancourt et al. 2001

Category: Species

Proposed as: comb. nov.

Basonym: Klebsiella ornithinolytica Sakazaki et al. 1989

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

Pronunciation, gender: or-ni-t^hi-no-LY-ti-ka, 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

Valid publication: Drancourt M, Bollet C, Carta A, Rousselier P. Phylogenetic analyses of Klebsiella species delineate Klebsiella and Raoultella gen. nov., with description of Raoultella ornithinolytica comb. nov., Raoultella terrigena comb. nov. and Raoultella planticola comb. nov. Int J Syst Evol Microbiol 2001; 51:925-932.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 51, part 3 of the IJSEM. Int J Syst Evol Microbiol 2001; 51:1231-1233.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Klebsiella ornithinolytica Sakazaki et al. 1989

Risk group: 2

• Synonyms:

  • Name	Kind
    Klebsiella ornithinolytica Sakazaki et al. 1989	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Raoultella ornithinolytica is the correct name instead 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 Raoultella.
  • 😷 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 Germany has been imported on 2023-10-29. The full classification is: risk group = 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.
  • 🎓 Name mentioned 256 times in PubMed until 2025-06-04.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of 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: Raoultella Drancourt et al. 2001

Assigned by: Drancourt M, Bollet C, Carta A, Rousselier P. Phylogenetic analyses of Klebsiella species delineate Klebsiella and Raoultella gen. nov., with description of Raoultella ornithinolytica comb. nov., Raoultella terrigena comb. nov. and Raoultella planticola comb. nov. Int J Syst Evol Microbiol 2001; 51:925-932.

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Record number: 780331