Aeromonas piscicola
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Aeromonadales, Family Aeromonadaceae, Genus Aeromonas,
Aeromonas piscicola
Beaz-Hidalgo et al. 2010.
Gram-negative, rod-shaped cells, 1.5-2 x 0.6-1 µm. Motile by a polar flagellum.
Beta-hemolytic colonies on sheep blood agar. Brown diffusible pigment is not
produced. Growth occurs at 4-37 ºC; optimum growth temperature 25-30 ºC.
Isolated from fish; 2 strains from salmon (Salmo salar), 2 strains from trout (Oncorhynchus mykiss) and 1 strain from a goldfish
(
Carassius auratus). Resistant to vibriostatic agent O/129 (150 µg), resistant to ampicillin (10 µg), amoxicillin (25 µg) to amoxicillin +
clavulanic acid (20/10 µg), ticarcillin (75 µg), cephalothin (30 µg), erythromycin (5 µg) and penicillin (10 µg).
Isolated from diseased and dying fish.
  1. J.P. Euzéby: List of Prokaryotic names with Standing in Nomenclature - Genus Aeromonas. Available online at https://www.
    bacterio.cict.fr/bacdico/aa/piscicola.html
Positive results for catalase, oxidase, nitrates reduction, ONPG, indole production,
lysine decarboxylase, Voges-Proskauer test, arginine dihydrolase, DNase, esculin
hydrolysis, gelatin hydrolysis, elastase, Tween 80 hydrolysis, starch hydrolysis, H
2S
production from cysteine, acid production from: starch, arbutin (at 25 ºC), esculin,
D-fructose, D-galactose, methyl-alpha-D-glucopyranoside, glycogen, D-glucose
(with gas), N-acetylglucosamine, glycerol, D-maltose, D-mannitol, D-mannose,
D-ribose, sucrose, salicin, and D-trehalose.

Negative results for ornithine decarboxylase, methyl red, acid production from: D-adonitol, amygdalin, D- or L-arabinose, D- or
L-arabitol, D-cellobiose, dulcitol, erythritol, D- or L-fucose, gentiobiose, 2- or 5-ketogluconate, inositol, inulin, D-lactose, D-lyxose,
methyl-alpha-D-mannopyranoside, D-melezitose, D-melibiose, D-raffinose, L-sorbose, D-tagatose, D-turanose, xylitol,
methyl-beta-D-xylopyranoside, D- or L-xylose.
(c) Costin Stoica
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