title: Western equine encephalitis--United States and Canada, 1987.
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D002170:Canada; D004196:Disease Outbreaks / Q000662:veterinary; D004667:Encephalitis Virus, Western Equine; D004674:Encephalitis, St. Louis / Q000453:epidemiology; D004683:Encephalomyelitis, Equine / Q000453:epidemiology* / Q000662:veterinary; D005260:Female; D006734:Horse Diseases / Q000453:epidemiology*; D006736:Horses; D006801:Humans; D008297:Male; D008875:Middle Aged; D011159:Population Surveillance; D014481:United States