[A survey on infection rate of Japanese encephalitis virus in Culex tritaeniorhynchus in Beijing area].
D000818:Animals; D002681:China; D003465:Culex / Q000382:microbiology*; D004664:Encephalitis Virus, Japanese / Q000302:isolation & purification* / Q000472:pathogenicity; D005260:Female; D051379:Mice