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What is Japanese B encephalitis virus is transmitted by the following vector and explain in detail?
(A) Culex tritaeniorhynchus # Japanese encephalitis:> The virus was first isolated in Japan during an epidemic in 1935. Several large epidemics have occurred since then. Epidemics show a seasonal incidence (summer-autumn) in the temperate regions, though this is not evident in the tropical areas.> Culex tritaeniorhynchus, a rural mosquito that breeds n rice fields, is the principal vector.> In India, Japanese encephalitis was first recognised in 1955 when the virus was isolated from mosquitoes of the Culex vishnui complex from Vellore during an outbreak of encephalitis in Tamiinadu.