Abstract
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
Highlights
Indian aquaculture advanced from a traditional practice and developed into an important food production sector, contributing to national economies and providing better livelihoods for rural and farming families
Three major Vibrio species, such as V. harveyi V. anguillarum and V. parahaemolyticus were isolated from the infected shrimp farms at Marakkanam, Kancheepuram district of Tamilnadu and Artemia franciscana culture tank at CMST campus
Marine and brackish water shellfish) V. harveyi, V. alginolyticus and V. parahaemolyticus have infected in juveniles and adults [23]
Summary
Indian aquaculture advanced from a traditional practice and developed into an important food production sector, contributing to national economies and providing better livelihoods for rural and farming families. Increasing world trade liberalization and globalization as well as improved transportation efficiency contributed to a great extent for the farmer to be part of a production chain for the delivery of the safe and high quality products to the end users. The aquaculture sector has become a key supplier of aquatic food, provider of direct and indirect employment, and a great source of foreign trade earnings. The higher growth of shrimp farming operations has become a potential cause of many problems. The expansion of shrimp culture is accompanied by local environmental degradation and the occurrence of diseases of both infectious and noninfectious etiologies [1]
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