Johne's disease in sheep in Northern Ireland.
D000003:Abattoirs; D000818:Animals; D004751:Enteritis / Q000662:veterinary*; D009161:Mycobacterium / Q000302:isolation & purification; D009660:Northern Ireland; D010283:Paratuberculosis / Q000453:epidemiology / Q000382:microbiology / Q000473:pathology / Q000517:prevention & control / Q000662:veterinary*; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*