Chitin is one of the natural biopolymer found abundantly in the shells of crustaceans, insects and in cellwalls of fungi. In this study, we determined the effect of dietary administration of 0.5, 0.75 and 1% chitinon the immune response and disease resistance in freshwater prawn, challenged against Macrobrachiumrosenbergii nodavirus (MrNV) and extra small virus (XSV). We observed a significantl…