title: Resistance of nonlambing exotic and domestic ewes to naturally acquired gastrointestinal nematodes.
mesh_terms: D000818:Animals; D001947:Breeding; D005260:Female; D007113:Immunity, Innate; D007411:Intestinal Diseases, Parasitic / Q000276:immunology / Q000662:veterinary*; D007774:Lactation; D009349:Nematode Infections / Q000276:immunology / Q000469:parasitology / Q000662:veterinary*; D011247:Pregnancy; D012756:Sheep / Q000469:parasitology / Q000502:physiology; D012757:Sheep Diseases / Q000276:immunology*