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Isolation and Characterization of Vibrio Species from Shrimp and Artemia Culture and Evaluation of the Potential Virulence Factor

Kumaran T and Citarasu T

The intensive cultivation conditions for marine shellfish larvae may easily cause microbial problems. Vibrio species are commonly present in disease affected shrimp farms, seawater and sediments. Vibriosis has resulted in severe economic losses to aquaculture worldwide and affects many farm-raised fishes, shrimps, crustaceans and Artemia. V. harveyi and closely related bacterial species are commonly found in estuarine and coastal marine habitats and can readily be isolated from different environmental sources. The lethal toxicity of extracellular products (ECPs) produced by V. harveyi V. anguillarum and V. parahaemolyticus isolated from shrimp and Artemia culture. Also the virulence factors such as protease, proteolytic activity, and phospholipase and lipase activity and haemolytic activity was studied the virulence strains compared with the non-virulent Vibrio strains. This paper addresses the virulence and epidemiology of vibrio pathogen; pathogenesis of its disease