Why in the News?
• The Minister of Fisheries, Animal Husbandry and Dairying informed the Rajya Sabha about White Spot Disease
About White Spot Disease
• Highly contagious viral disease
• Affects crustaceans such as prawns, yabbies, and crabs
• Causes mass mortality in shrimp aquaculture
Causative Agent
• White Spot Syndrome Virus (WSSV)
• Double stranded DNA virus
• Genus: Whispovirus
• Family: Nimaviridae
Host Range
• All decapod crustaceans belonging to order Decapoda
• Includes prawns, shrimps, lobsters, and crabs
• Occurs in marine, brackish, and freshwater environments
Mode of Transmission
• Vertical transmission
From infected brood stock to post larvae
• Horizontal transmission
Through carrier animals
By cannibalism of infected organisms
Geographical Distribution
• Reported from Bangladesh and eastward from India
| Among the following organisms, which one does not belong to the class of other three? (2014)
(a) Crab (b) Mite (c) Scorpion (d) Spider |
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