Letter: Hydatid cysts and sweet itch in horses.
D000818:Animals; D004443:Echinococcosis / Q000453:epidemiology / Q000662:veterinary*; D004485:Eczema / Q000662:veterinary*; D006734:Horse Diseases / Q000453:epidemiology*; D006736:Horses; D013020:South America; D009626:Terminology as Topic