Viral diseases 12 Microbiology 10 viral diseases 9 Bacterial diseases 8 Viral Diseases 7 Bacterial Diseases 6 Fungal diseases 5 Nutrition- Plant Pathogens 5 Pathogenesis 5 Plant Pathology 5 Root Diseases 5 Diagnostic virology 4 Wilts 4 Animal nutrition 2 Fishes 2 Host Resistance and Immunity 2 Non-communicable Diseases and Injuries of Animals 2 Parasitoses 2 Plant Biotechnology and Molecular Biology 2 Prion, Viral, Bacterial and Fungal Pathogens of Animals, (New March 2000) 2 Protozoan, Helminth, Mollusc and Arthropod Parasites of Animals, (New March 2000) 2 Vaccines 2 Veterinary virology 2 Virology 2 Virus diseases 2 virology 2 Aeromicrobiology 1 Aetiology 1 Agricultural Microbiology 1 Agrochemicals 1