PROTEOBACTERIA >> Gamma >> Edwardsiella >> Edwardsiella ictaluri
EDWARDSIELLA ICTALURI
| Class: | Gamma Proteobacteria |
| Genus: | Edwardsiella |
| Species: | Edwardsiella ictaluri |
| Description: | Gram-negative, straight bacilli, 1.0 x 2.0–3.0 μm, usually motile by peritrichous flagella(nonmotile strains may occur). No capsule production Growth occurs on usual media, producing small colonies (0.5-1.0 mm in diameter) after 24 h incubation. Optimum temperature, 37 ºC.E. ictaluri appears as smooth, circular (1-2 mm diameter), slightly convex non-pigmented colonies. Center-black colonies on SS agar. Facultatively anaerobic.Incubation temperature 28-37 ºC. The bacteria grows slowly but does not require special nutrients. |
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| Source: | It has been isolated from channel catfish (I.punctatus),white catfish (Ictalurus catus), and brown bullhead(Ictalurus nebulosus). |
| Pathogenicity: | Pathogen for catfish (Ictalurus punctatus), E. ictaluri causes 'enteric septicaemia of catfish' (disease may have 2 forms: chronic encephalitis or acute septicaemia’, may cause sudden massive die-offs of up to 50% of pond population.). One report of hepatic abscesses in dog. |
| Genbank: | AB050826.1(16s rRNA) [Genome] [Nucleotide] |
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| Reference: | HAWKE (J.P.), McWHORTER (A.C.), STEIGERWALT (A.G.) and BRENNER (D.J.): Edwardsiella ictaluri sp. nov., the causative agent of enteric septicemia of catfish. Int. J. Syst. Bacteriol., 1981, 31, 396-400. |
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