Aeromonas bivalvium
Taxonomy
Morphology
Cultural characteristics
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Pathogenicity
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Phylum Proteobacteria, Class Gammaproteobacteria, Order Aeromonadales, Family Aeromonadaceae, Genus Aeromonas,
Aeromonas bivalvium
Minana-Galbis et al. 2007.
Gram-negative, straight, coccoids / rods 0.5–2.0 x 0.3–1.0 µm. Motile by a polar
flagellum.
Colonies on TSA are 3–4 mm in diameter, opaque, circular and beige in colour after
48 hours at 25 ºC. No brown diffusible pigment is produced. Grow aerobically and
anaerobically. Growth occurs at 4–40.5 ºC (variable),  optimum 30-37 ºC. Can grow in
nutrient broth with: 0 and 3% NaCl, weakly at 6% NaCl, but not at 7% NaCl. Can grow
at pH 9.0, but not at pH 4.5.
Grows on MacConkey agar and m-Aeromonas-selective agar base Havelaar.
Isolated from bivalve molluscs: cockles (Cardium sp.) and razor shells (Ensis sp.), respectively, from retail markets in Barcelona
(Spain).
Resistant to vibriostatic agent O/129 (150 µg), amoxycillin + clavulanic acid (30 µg), ampicillin (10 µg), erythromycin (15 µg) and
penicillin G (10 µg).
Undetermined.
  1. David Minana-Galbis, Maribel Farfan, M. Carme Fuste, and J. Gaspar Lorén. Aeromonas bivalvium sp. nov., isolated from bivalve
    molluscs. Int J Syst Evol Microbiol March 2007 57:582-587.
Positive results for catalase, oxidase, nitrate reduction, indole production, methyl red,
ONPG, citrate utilization, gelatin hydrolysis, lysine decarboxylase, arbutin hydrolysis,
DN-ase, aesculin hydrolysis, starch hydrolysis, acid production from: D-glucose
(without gas production), L-arabinose, arbutin, dextrin, D-galactose, glycerol, D-mannitol, salicin, sucrose & D-trehalose.

Negative results for arginine dihydrolase, ornithine decarboxylase, Voges–Proskauer test, H
2S production from cysteine thiosulfate,
elastin hydrolysis, urea hydrolysis, xanthine hydrolysis, acid production from: lactose, D-mannose, D-melibiose, D-raffinose, L-
rhamnose, sorbitol & D-xylose.
(c) Costin Stoica
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