Name: Tetragenococcus solitarius (Collins et al. 1989) Ennahar and Cai 2005

Category: Species

Proposed as: comb. nov.

Basonym: Enterococcus solitarius Collins et al. 1989

Etymology: so.li.ta’ri.us. L. masc. adj. solitarius, alone, lonely

Pronunciation, gender: so-li-TA-ri-us, masculine

Type strain: 885/78; ATCC 49428; CCUG 29293; CIP 103330; DSM 5634; JCM 8736; LMG 12890; NBRC 100494; NCTC 12193

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ301840 Analyse FASTA

Valid publication: Ennahar S, Cai Y. Biochemical and genetic evidence for the transfer of Enterococcus solitarius Collins et al. 1989 to the genus Tetragenococcus as Tetragenococcus solitarius comb. nov. Int J Syst Evol Microbiol 2005; 55:589-592.

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 55, part 2 of the IJSEM. Int J Syst Evol Microbiol 2005; 55:1399-1402.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name (and explicitly recommended for medical use)

Risk group: 1

• Synonyms:

  • Name	Kind
    Enterococcus solitarius Collins et al. 1989	homotypic synonym, validly published under the ICNP

• Notes:
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1, note = "+". — 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 2 times in PubMed until 2025-06-04.
  • 🫡 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as the name to be applied to this species. The name is on LoRN because of the recorded risk group of the species itself. This name is not taxonomically suspended any more in favour of Enterococcus solitarius Collins et al. 1989. Publication: Collins MD, Facklam RR, Farrow JA, Williamson R. Enterococcus raffinosus sp. nov., Enterococcus solitarius sp. nov. and Enterococcus pseudoavium sp. nov. FEMS Microbiol Lett 1989; 57:283-288. Anonymous. Validation list no. 30. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1989; 39:371.

Parent taxon: Tetragenococcus Collins et al. 1993

Assigned by: Ennahar S, Cai Y. Biochemical and genetic evidence for the transfer of Enterococcus solitarius Collins et al. 1989 to the genus Tetragenococcus as Tetragenococcus solitarius comb. nov. Int J Syst Evol Microbiol 2005; 55:589-592.

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Record number: 782433