Species ***Flavobacterium* *columnare***

Name: Flavobacterium columnare (Bernardet and Grimont 1989 ex Davis 1922) Bernardet et al. 1996

Category: Species

Proposed as: comb. nov.

Basonym: Flexibacter columnaris (ex Davis 1922) Bernardet and Grimont 1989

Etymology: co.lum.na’re. L. neut. adj. columnare, rising in the form of a pillar, referring to the shape of the aggregates formed by the bacteria on external lesions of infected fish

Pronunciation (Latin), gender: fla-wo-bak-TE-ri-um ko-lum-NA-re, neuter

Type strain: 1-S-2cl (Anacker 1956); ATCC 23463; DSM 18644; NCIMB 2248; NCMB 2248

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB078047 Analyse FASTA

Valid publication: Bernardet JF, Segers P, Vancanneyt M, Berthe F, Kersters K, Vandamme P. Cutting a Gordian knot: emended classification and description of the genus Flavobacterium, emended description of the family Flavobacteriaceae, and proposal of Flavobacterium hydatis nom. nov. (basonym, Cytophaga aquatilis Strohl and Tait 1978). Int. J. Syst. Bacteriol. 1996; 46:128-148. 🇫🇷

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 46, part 1 of the IJSB. Int J Syst Bacteriol 1996; 46:627.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

Synonyms:

Name	Kind
Cytophaga columnaris (ex Garnjobst 1945) Reichenbach 1989	homotypic synonym, validly published under the ICNP, belated name
Flexibacter columnaris (ex Davis 1922) Bernardet and Grimont 1989	homotypic synonym, validly published under the ICNP

Emendations:
- La Frentz et al. 2022 LaFrentz BR, Kralova S, Burbick CR, Alexander TL, Phillips CW, Griffin MJ, Waldbieser GC, Garcia JC, de Alexandre Sebastiao F, Soto E, et al. The fish pathogen Flavobacterium columnare represents four distinct species: Flavobacterium columnare, Flavobacterium covae sp. nov., Flavobacterium davisii sp. nov. and Flavobacterium oreochromis sp. nov., and emended description of Flavobacterium columnare. Syst Appl Microbiol 2021; 45:126293. 🇺🇸
  Notes:
  - 🧍 As of 2022-01-21 this emendation was not yet included in an IJSEM List of Changes in Taxonomic Opinion.

Notes:
- 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 1, note = "animal pathogen - biological class of risk animal: 2". — 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 = "PV". — The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 1, note = "t2". — 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 423 times in PubMed until 2026-06-11.
- 🙆 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.
- 🧍 See also La Frentz et al. (2018). Publication: LaFrentz BR, Garcia JC, Waldbieser GC, Evenhuis JP, Loch TP, Liles MR, Wong FS, Chang SF. Identification of Four Distinct Phylogenetic Groups in Flavobacterium columnare With Fish Host Associations. Front Microbiol 2018; 9:452. 🇺🇸
- 🧍 The phylogenetic position of this species was determined in a genome-scale analysis by García-López et al. (2019). Publication: Garcia-Lopez M, Meier-Kolthoff JP, Tindall BJ, Gronow S, Woyke T, Kyrpides NC, Hahnke RL, Goker M. Analysis of 1,000 Type-Strain Genomes Improves Taxonomic Classification of Bacteroidetes. Front Microbiol 2019; 10:2083. 🇩🇪

Parent taxon: Flavobacterium Bergey et al. 1923 (Approved Lists 1980)

Assigned by: Bernardet JF, Segers P, Vancanneyt M, Berthe F, Kersters K, Vandamme P. Cutting a Gordian knot: emended classification and description of the genus Flavobacterium, emended description of the family Flavobacteriaceae, and proposal of Flavobacterium hydatis nom. nov. (basonym, Cytophaga aquatilis Strohl and Tait 1978). Int. J. Syst. Bacteriol. 1996; 46:128-148. 🇫🇷

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Record number: 783845

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Species Flavobacterium columnare

Species ***Flavobacterium* *columnare***