Japanese B encephalitis
noun
Jap·a·nese B encephalitis
| \ ˌjap-ə-ˌnēz-ˈbē-
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Medical Definition of Japanese B encephalitis
: 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