Herd prevalence of Johne's disease.
Arbuckle
Brian
B
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis / Q000191:economics / Q000453:epidemiology*; D010283:Paratuberculosis / Q000175:diagnosis / Q000191:economics / Q000453:epidemiology*; D006113:United Kingdom / Q000453:epidemiology