Prevalence of White Spot Syndrome Virus (WSSV) in wild-caught Indian white shrimp, Fenneropenaeus indicus in the Cuddalore coast, Tamilnadu.
Description
The prevalence of asymptomatic WSSV carriers and hosts in the wild. Experimental infectivity studies were used to investigate the infectivity potential of asymptomatic carriers in the transmission of infection of the widely cultured candidate F. indicus. This investigation requires gross observation, light microscopy, histopathology, and molecular diagnosis. Samples were taken from four locations in the Cuddalore district: Vellar estuary, Buckingham canal, Pichavaram mangrove forest, and Uppanar estuary. The white spots on the carapace have a melanized double membrane circular pattern.
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The white spots on the carapace have a melanized double membrane circular pattern. The infection was confirmed further using the most sensitive molecular diagnostic tool, PCR. The histopathological manifestation of WSSV-infected F. indicus gill tissue revealed numerous Cowdry type 'A' inclusion bodies, representing acidophile accumulation surrounded by halos within the nuclei. The virions' rod-shaped symmetry confirms the infection as WSSV