Name: Formivibrio citricus Tanaka et al. 1991

Category: Species

Proposed as: sp. nov.

Etymology: ci’tri.cus. N.L. neut. n. acidum citricum, citric acid; N.L. masc. adj. citricus, pertaining to citric acid

Pronunciation, gender: KI-tri-kus, masculine

Type strain: ATCC 49791; CreCit1; DSM 6150

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: Y17602 Analyse FASTA

Effective publication: Tanaka K, Nakamura K, Mikami E. Fermentation of S-citramalate, citrate, mesaconate, and pyruvate by a gramnegative strictly anaerobic non-spore-former, Formivibrio citricus gen. nov., sp. nov. Arch. Microbiol. 1991; 155:491-495.

IJSEM list: Anonymous. Validation list no. 39. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1991; 41:580-581.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Notes:
  • 🥇 Nomenclatural type of the genus Formivibrio Tanaka et al. 1991. Publication: Tanaka K, Nakamura K, Mikami E. Fermentation of S-citramalate, citrate, mesaconate, and pyruvate by a gramnegative strictly anaerobic non-spore-former, Formivibrio citricus gen. nov., sp. nov. Arch. Microbiol. 1991; 155:491-495.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 2, note = "PP?". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1. — 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 4 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.

Parent taxon: Formivibrio Tanaka et al. 1991

Assigned by: Tanaka K, Nakamura K, Mikami E. Fermentation of S-citramalate, citrate, mesaconate, and pyruvate by a gramnegative strictly anaerobic non-spore-former, Formivibrio citricus gen. nov., sp. nov. Arch. Microbiol. 1991; 155:491-495.

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Record number: 776317