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Medical Dictionary

Japanese B encephalitis

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noun Jap·a·nese B encephalitis \ˌjap-ə-ˌnēz-ˈbē-\

Medical Definition of Japanese B encephalitis

  1. :  an encephalitis that occurs epidemically in Japan and other Asian countries in the summer, is caused by a single-stranded RNA virus of the genus Flavivirus (species Japanese encephalitis virus) transmitted by mosquitoes (especially Culex tritaeniorhynchus), and usually produces a subclinical infection but may cause acute meningoencephalomyelitis




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