Horizontal and Vertical Transmission of Japanese Encephalitis Virus by Aedes japonicus (Diptera: Culicidae)

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Abstract
Aedes japonicus (Theobald) was evaluated for competence as a vector of Japanese encephalitis virus and for its ability to transmit the virus vertically to its F1 larvae. Ae. japonicus supported the growth of the virus at 20 and 28°C after feeding on a virus–blood mixture of 106.2 plaque forming unit (PFU)/ml. This species was able to transmit the virus to suckling mice after feeding on a virus–blood meal (106.2 PFU/ml) or a viremic chick (103.7 PFU/ml). Vertical transmission of the virus in Ae. japonicus was demonstrated with a minimum infection rate of 0.7%.