EHV-1: a recurrent problem.
D000818:Animals; D004196:Disease Outbreaks / Q000662:veterinary; D005260:Female; D006566:Herpesviridae Infections / Q000175:diagnosis / Q000453:epidemiology / Q000662:veterinary*; D004861:Herpesvirus 1, Equid / Q000302:isolation & purification; D006734:Horse Diseases / Q000175:diagnosis / Q000453:epidemiology; D006736:Horses