Epidemiological studies on Pasteurella Haemolytica in sheep.
D000818:Animals; D004812:Epidemiologic Methods; D010326:Pasteurella Infections / Q000453:epidemiology* / Q000662:veterinary*; D012698:Serologic Tests; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*; D006113:United Kingdom