[Epidemiology of Japenese encephalitis--factor analysis of its decline in recent years].
D000818:Animals; D003465:Culex / Q000254:growth & development*; D004463:Ecology; D004672:Encephalitis, Japanese / Q000453:epidemiology / Q000662:veterinary*; D007564:Japan; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology*