Name: Yokenella regensburgei Kosako et al. 1985

Category: Species

Proposed as: sp. nov.

Etymology: N.L. gen. neut. n. regensburgei, of Regensburg, Germany, where the type strain of Yokenella regensburgei and five other strains in the original paper (Kosako et al., 1984) were isolated from insects

Gender: feminine

Type strain: ATCC 49455; BCRC 12225; CCRC 12225; CIP 105435; JCM 2403; NBRC 102600; NCTC 11966; NIH 725-83

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: JN175339 Analyse FASTA

Effective publication: Kosako Y, Sakazaki R, Yoshizaki E. Yokenella regensburgei gen. nov., sp. nov.: a new genus and species in the family Enterobacteriaceae. Jpn J Med Sci Biol 1984; 37:117-124.

IJSEM list: Anonymous. Validation list no. 17. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1985; 35:223-225.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 2

• Synonyms:

  • Name	Kind
    Koserella trabulsii Hickman-Brenner et al. 1985	heterotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Yokenella Kosako et al. 1985. Publication: Kosako Y, Sakazaki R, Yoshizaki E. Yokenella regensburgei gen. nov., sp. nov.: a new genus and species in the family Enterobacteriaceae. Jpn J Med Sci Biol 1984; 37:117-124.
  • ⏰ According to Kosako et al. (1987), this species is an earlier heterotypic synonym of Koserella trabulsii Hickman-Brenner et al. 1985. Publication: Kosako Y, Sakazaki R, Huntley-Carter GP, Farmer Iii JJ. Yokenella regensburgei and Koserella trabulsii are subjective synonyms. Int. J. Syst. Bacteriol. 1987; 37:127-129.
  • 😷 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 26 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.
  • 🧍 Priority: IJSB 41:171. Publication: Kosako Y, Sakazaki R. Priority of Yokenella regensburgei Kosako, Sakazaki, and Yoshizaki 1985 over Koserella trabulsii Hickman-Brenner, Huntley-Carter, Brenner, and Farmer 1985. Int. J. Syst. Bacteriol. 1991; 41:171.
  • 🧍 See also: Publication: Wayne LG. JUDICIAL COMMISSION: Minutes of the Meeting, 14 September 1990, Osaka, Japan. Int. J. Syst. Bacteriol. 1991; 41:185-187.

Parent taxon: Yokenella Kosako et al. 1985

Assigned by: Kosako Y, Sakazaki R, Yoshizaki E. Yokenella regensburgei gen. nov., sp. nov.: a new genus and species in the family Enterobacteriaceae. Jpn J Med Sci Biol 1984; 37:117-124.

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Record number: 783205