A total of 19 water samples (20–100 L) from shrimp aquaculture facilities, comprising three creeks, ten shrimp culture ponds, five shrimp hatcheries (three broodstock tanks and two larval rearing tanks), and a shrimp hatchery effluent treatment tank (Table 1) were collected in clean disinfected carboys and transported to the laboratory and processed for concentration of viruses in water.