Johne's disease: a retrospective study of vaccinated herds in Great Britain.
D000822:Animal Husbandry; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology / Q000517:prevention & control*; D005260:Female; D010283:Paratuberculosis / Q000453:epidemiology / Q000517:prevention & control*; D012189:Retrospective Studies; D006113:United Kingdom; D014611:Vaccination / Q000662:veterinary*