Giant freshwater prawn (Macrobrachium rosenbergii (de Man, 1879) (or scampi) is an important commercial species due to property as food supply as well as a aluable export product. In India,giant freshwater prawn distributes mainly in the Southern region where environmental conditions are most favorable for the growth of scampi. Increasing demand of this species for domestic consumption and export markets has increased remarkably scampi cultured systems with large scale, high stocking density and intensive feeding. Consequently, cultivation of this economic species is being expanded to culture in rice fields, orchard gardens, pens along river banks. Hence, disease is inevitable in these uncontrollable culture models.