Incidence of white spot disease (WSD) in Penaeus indicus farms in Bushehr Province, Iran

The incidence of white spot disease in farmed Penaeus indicus inBusheher region was evaluated by analyzing 200 shrimp individuals between Juneand September, 2005. The samples were examined for clinical sign includingobservation of white spots on the cuticle and tissue. Samples were processed usingpolymerase chain reaction (Nested-PCR) test. The results showed that 24% of thesamples examined were clinically positive having white spots on their cuticles. Also,92% of the samples examined were positive in PCR examination. Furthermore, 70%of apparently healthy shrimp were positively identified using the by PCR test.