Morphology | Aeromonas |
CELLULAR |
Staining | Gram-negative |
Morphology | Cells straight, rod shaped with rounded ends to coccoid, 0.3-1.0 um in diameter and 1.0-3.5 um in length. Occur singly, in pairs or short chains |
Motility | Generally motile by a single polar flagellum; peritrichous flagella may be formed on solid media in young cultures. One species is nonmotile. |
Specialized structures | Resting stages not known |
Division |
COLONIAL |
Solid surface |
Liquid |
Growth Parameters | Aeromonas |
PHYSIOLOGICAL |
Tropism | Chemoorganotrophic, using a variety of sugars and organic acids as carbon sources |
Oxygen | Facultative anaerobes Metabolism of glucose is both respiratory and fermentative. |
pH | |
Temperature | Optimum temperature, 22-28`C; some strains do not grow at 35`C. |
Requirements | |
Products | Carbohydrates are broken down to acid or acid and gas (CO2 and H2). Nitrate is reduced to nitrite. |
Enzymes | Oxidase-positive. Catalase-positive. |
Unique features | .Resistant to the vibriostatic agent 2,4-diamino-6,7-diiso- propylpteridine (0/129) |
ENVIRONMENTAL |
Habitat | Occur in freshwater and sewage. |
Lifestyle | |
Pathogenicity | Some species are pathogenic to frogs and fish |
Distribution |
Genome | Aeromonas |
G+C Mol % | 7-63 ( Bd, Tm). |
Reference | Aeromonas |
First citation | Kluyver, A.J. and C.B. van Niel (1936) Prospects for a natural system of classification of bacteria. Zentralbl. Bakteriol. Parasitenkd. Infektionskr. Hyg. Abt. II 94:369-403 |
The Prokaryotes | p |
Bergey's Systematatic | p 545 M. Popoff |
Bergey's Determinative | p 190 |
References |