Disease prevalence 3 Epidemiology 3 Aetiology 2 Cattle 2 Diagnosis 2 Diagnosis of Animal Diseases, (New March 2000) 2 Diagnostic techniques 2 Disease control 2 Disease prevention 2 Genetics and Molecular Biology of Microorganisms, (New March 2000) 2 Geographical distribution 2 Goats 2 Pesticides and Drugs; Control, (New March 2000) 2 Polymerase chain reaction 2 Prion, Viral, Bacterial and Fungal Pathogens of Animals, (New March 2000) 2 Ruminants 2 Sheep 2 Agalactia 1 Animal Genetics and Breeding, (New March 2000) 1 Animal Immunology, (New March 2000) 1 Animal models 1 Antibacterial agents 1 Antigenic variation 1 Bacterial antigens 1 Biochemistry and Physiology of Microorganisms, (New March 2000) 1 Biological Resources (General) 1 Camelidae 1 Cell culture 1 Control programmes 1 Costs 1