ABSTRACT
Shrimps being a highly valued export commodity, shrimp farming is considered as a lucrative industry. Bio-security requirements like reservoir ponds, fencing, crab fencing bird fencing, and disinfection facilities are incorporated in the design. To avoid disease in most cases zero-water exchange system of farming is practiced with recirculation facilities. The sludge left in the pond, may have the remains of the earlier viral disease outbreak, containing high organic load, bacteria, viral particles and DNA as well as many other viral carriers. White spot virus has been reported to survive as a free-living form in water up to seven days. Direct use of creek or sea water carries the risk of introducing the virus into the system. Most of the aquatic crustaceans including the planktonic forms are reported to be carriers of White Spot Syndrome Virus virus.
