title: Biosecurity: challenges of disease control at every level.
mesh_terms: D000820:Animal Diseases / Q000517:prevention & control*; D000818:Animals; D000829:Animals, Domestic; D002417:Cattle; D003140:Communicable Disease Control; D003141:Communicable Diseases / Q000662:veterinary*; D018563:Disease Notification; D005060:Europe