Aeromonas molluscorum
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Aeromonadales, Family Aeromonadaceae, Genus Aeromonas,
Aeromonas molluscorum
Minana-Galbis et al. 2004.
Old synonym:
Aeromonas sp. phenon VI Minana-Galbis et al. 2002.
Gram-negative, rod-shaped cells, 1.2-2 x 0.5-1 µm. Motile by a polar flagellum.
Colonies on TSA are 3-4 mm in diameter, translucent to opaque, circular and beige in
colour after 48 h at 25 ºC. Brown diffusible pigment is not produced. Growth occurs at
4-37 ºC, but not at 40.5 ºC; optimal growth temperature 25-30 ºC. Can grow in the
presence of 0-3% NaCl, but not at 6% NaCl. Can grow at ph 9.0 but not pH 4.5. Grows
on MacConkey agar.
Isolated from wedge-shells (Donax trunculus) obtained from a retail market in Barcelona (Spain). Resistant to vibriostatic agent
O/129 (150 µg). Resistant to ampicillin (10 µg) (except strain 431E), erythromycin (15 µg) and penicillin G (10 µg).
Undetermined.
  1. D. Minana-Galbis, M. Farfan, J.G. Loren, M.C. Fuste. Biochemical identification and numerical taxonomy of Aeromonas spp.
    isolated from environmental and clinical samples in Spain. Journal of Applied Microbiology Volume 93, Issue 3, pages 420–430,
    September 2002.
  2. David Minana-Galbis, Maribel Farfan, M. Carme Fuste, and J. Gaspar Loren. Aeromonas molluscorum sp. nov., isolated from
    bivalve molluscs. Int J Syst Evol Microbiol November 2004 54:2073-2078.
Positive results for catalase, oxidase, nitrates reduction, methyl red test, ONPG,
arginine dihydrolase, DNase, esculin hydrolysis, gelatin hydrolysis, citrate utilization,
acid production from: glucose (without gas production), L-arabinose, dextrin, D-galactose, glycerol, D-mannitol, D-mannose,
D-sucrose & D-trehalose.

Negative results for indole production, urea hydrolysis, H
2S production from cysteine and thiosulfate, elastase, starch hydrolysis,
Voges-Proskauer test, ornithine decarboxylase, lysine decarboxylase, acid production from: lactose, D-melibiose, D-raffinose,
L-rhamnose, sorbitol & D-xylose.

Variable results for acetate utilization, acid production from: arbutin & D-cellobiose.
(c) Costin Stoica
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