title: The incidence of salmonella infection in sheep in England and Wales, 1975 to 1981.
mesh_terms: D000818:Animals; D004739:England; D005260:Female; D012475:Salmonella / Q000302:isolation & purification; D012481:Salmonella Infections, Animal / Q000175:diagnosis / Q000453:epidemiology*; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*; D014852:Wales