title: West Nile fever in the United States.
mesh_terms: D000818:Animals; D001131:Arkansas / Q000453:epidemiology; D009033:Culicidae; D004196:Disease Outbreaks; D006736:Horses; D006801:Humans; D020308:Songbirds; D014481:United States / Q000453:epidemiology; D014901:West Nile Fever / Q000453:epidemiology* / Q000635:transmission