Ovine ostertagiosis in the spring.
Connan
R M
RM
D000822:Animal Husbandry; D000818:Animals; D004196:Disease Outbreaks; D010029:Ostertagiasis / Q000453:epidemiology / Q000662:veterinary*; D012621:Seasons; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*