Aeromonas is a gram-negative, facultative anaerobic rod that morphologically resembles members of the family Enterobacteriaceae. Fourteen species of Aeromonas have been described, most of which have been associated with human diseases. The most important pathogens are A. hydrophila, A. caviae, and A. veronii biovar sobria. The organisms are ubiquitous in fresh and brackish water.
Aeromonas is a genus of bacteria that is ubiquitous in the environment. It is exhibit in totally eccentrics of water supply worldwide as well as food and soil. These organisms have also been isolated from a variety of foods, including red meats (beef, pork, lamb), poultry, produce, fish, and shellfish. There are approximately 16 contrasting species inwards this genus, the most beneficial known of which is Aeromonas hydrophila. Physiologically, Aeromonas are standardized to bacteria fashionable the coliform chemical group and can be isolated from similar environments.
Aeromonas is a normal part of the microflora found in these waters, and its presence does not indicate the water has been polluted. The cytotoxic enterotoxin gene (act), a single-chain polypeptide, is one of the primary genes that makes this species pathogenic. Heat-labile cytotonic enterotoxins (elevation), a heat-stable cytotonic enterotoxins (Ast) also have genes that contribute to toxicity. These are labeled alt and ast, respectively. Albert et. al. (2000) noted that three distinct genes code for these enterotoxins: act, alt and ast.
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