There were five treatments with 30 prawns each. After the injection, each group of ten prawnswas kept in 60 L glass aquaria (10 prawns each) containing 40 L of freshwater and 27 ± 1.0 C. During the experiment, prawns were continually fed with their respective diets, and 30% of thewaterwas exchanged daily. The mortality was counted on a daily basis for the total experimental period of 144 h. The relative percent survival (RPS) of prawn was calculated at the end of the experiment according to Amend using the following formula