The problem of the transmissible encephalitis in the light of the natural focus theory.
D000818:Animals; D004660:Encephalitis; D004671:Encephalitis, Arbovirus / Q000635:transmission*; D004679:Encephalomyelitis; D004683:Encephalomyelitis, Equine / Q000635:transmission*; D058872:Epidemics; D006736:Horses; D006801:Humans
ENCEPHALITIS, EPIDEMIC/transmission; ENCEPHALOMYELITIS, EQUINE/transmission