Demonstration of human infection in the natural focus of the Valtice fever.
D000328:Adult; D000818:Animals; D001102:Arbovirus Infections / Q000453:epidemiology* / Q000276:immunology / Q000382:microbiology; D001103:Arboviruses / Q000302:isolation & purification; D003604:Czechoslovakia; D006801:Humans; D008297:Male; D051379:Mice; D009500:Neutralization Tests