| Species/Subspecies: | Edwardsiella ictaluri | ||||||||||
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| Etymology: | Genus name: named after the American bacteriologist P. R. Edwards (1901-1966). Species epithet: refers to catfish (genus Ictalurus). | ||||||||||
| Significance: | Har betydelse i de länder där man odlar dvärgmal, t.ex. USA, Australien och Thailand. Sjukdomen har aldrig påvisats i Sverige. [Of minor importance] |
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| Taxonomy: | Class Gammaproteobacteria Order Enterobacterales Family Hafniaceae Genus Edwardsiella |
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| Type Strain: | SECFDL (Southeastern Cooperative Fish Disease) Laboratory) GA 77-52 = ATCC 33202 = CCUG 18764 = NCTC 12122. | ||||||||||
| Macromorphology (smell): | |||||||||||
| Micromorphology: | Nonmotile short rods (0.8 x 1-3 µm). | ||||||||||
| Gram +/Gram -: | G- | ||||||||||
| Metabolism: | Facultatively anaerobic | ||||||||||
| Catalase/Oxidase: | ?/- | ||||||||||
| Other Enzymes: | DNase -, esculinase -, ornithine decarboxylase v, tryptophanase - (cf. E. tarda), urease -. | ||||||||||
| Biochemical Tests: | Citrate -, hydrogen sulfide v, methyl red -, Voges-Proskauer - | ||||||||||
| Fermentation of carbohydrates: | D-glucose + lactose - maltose + L-rhamnose - sucrose - L-arabinose - cellobiose - D-mannitol - salicin - trehalose - glycerol - inulin ? raffinose - D-sorbitol - starch ? |
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| Spec. Char.: | Does not grow at 42°C (cf. E. tarda). | ||||||||||
| Disease: | "Hole in the head disease". |
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| Hosts: | Fish of the genus dwarf catfish, especially channel catfish (Ictalurus punctatus). | ||||||||||
| Clinical Picture: | Spot formed bleeding in the oral cavity, throat, abdomen and at the bases of the fins. | ||||||||||
| Genome Sequence: |
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| 16S rRNA Seq.: |
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| Taxonomy/phylogeny:
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Four species have been described within the genus Edwardsiella. These bacteria belong to the familyEnterobacteriaceae and they are relatively closely related to bacteria within the genera Morganella and Proteus. | ||||||||||
| Reference(s): | No. 174 | ||||||||||
| Updated: | 2023-03-29 |