Species of bacterium
Flavobacterium columnare Gram-negative rod bacterium of the genus Flavobacterium rhizoid columnar formations.[ 2]
The species was first described by Davis (1922), and the name was validated by Bernardet and Grimont (1989).[ 3]
Flavobacterium columnare can be identified in the laboratory by a five-step method that demonstrates:
the ability to grow on a medium containing neomycin and polymyxin B
production of yellow pigmented rhizoid (root-like in appearance) colonies
production of a gelatin-degrading enzyme
binding of Congo red dye to the colony
production of a chondroitin sulfate-degrading enzyme[ 4] The species has been known previously as Flexibacter columnaris , Bacillus columnaris , and Cytophaga columnaris .
Flavobacterium columnare is one of the oldest known diseases among warm-water fish, and manifests itself as an infection commonly known as columnaris . Infections are the second leading cause of mortality in pond raised catfish in the southeastern United States.[ 4] [ 5]
References
^ Parte, A.C. "Flavobacterium" . LPSN ^ Declercq, Annelies Maria; Haesebrouck, Freddy; Van Den Broeck, Wim; Bossier, Peter; Decostere, Annemie (2013). "Columnaris disease in fish: A review with emphasis on bacterium-host interactions" . Veterinary Research . 44 (1): 27. doi :10.1186/1297-9716-44-27 PMC 3648355 PMID 23617544 . ^ Bertolini, J. M.; Rohovec, J.S. (1992). "Electrophoretic detection of proteases from different Flexibacter columnaris strains and assessment of their variability" . Diseases of Aquatic Organisms . 12 : 121– 128. doi :10.3354/dao012121 ^ a b Durborrow, RM; Thune, RL; Hawke, JP; Camus, AC (September 1998). "Columnaris Disease - A Bacterial Infection Caused by Flavobacterium columnare " (PDF) . SRAC Publication No. 479. Southern Regional Aquaculture Center. Retrieved 12 January 2025 – via Iowa State University North Central Regional Aquaculture Center. ^ Darwish, A M; Mitchell, A J; Straus, D L (2009). "Evaluation of potassium permanganate against an experimental subacute infection of Flavobacterium columnare in channel catfish, Ictalurus punctatus (Rafinesque)" . Journal of Fish Diseases . 32 (2): 193– 199. doi :10.1111/j.1365-2761.2008.01015.x . ISSN 0140-7775 .
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