title: Toxoplasmosis in sheep. Long-term epidemiological studies in four breeding flocks.
mesh_terms: D000034:Abortion, Veterinary / Q000209:etiology; D000367:Age Factors; D000822:Animal Husbandry; D000818:Animals; D005260:Female; D007247:Infertility, Female / Q000209:etiology / Q000662:veterinary; D009664:Norway; D011247:Pregnancy; D012621:Seasons; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*; D013997:Time Factors; D014124:Toxoplasmosis, Animal / Q000150:complications / Q000453:epidemiology*