Protozoan, Helminth, Mollusc and Arthropod Parasites of Animals, (New March 2000) 19 Protozoan, Helminth and Arthropod Parasites of Humans, (New March 2000) 16 Helminths 10 Human diseases 10 Man 10 Parasitology 10 Prion, Viral, Bacterial and Fungal Pathogens of Animals, (New March 2000) 7 Disease control 6 Immunology 6 Microbiology 6 Non-communicable Diseases and Injuries of Animals 6 Parasites 6 Diagnosis 5 Epidemiology 5 Fishes 5 Immunity 5 Infectious diseases 5 Laws and Regulations 5 Medical microbiology 5 Plant Pests, (New March 2000) 5 Public Health Pests, Vectors and Intermediate Hosts, (New March 2000) 5 Diagnostic microbiology 4 Host Resistance and Immunity 4 Immune system 4 Insects 4 Legislation 4 Microbiological Techniques 4 Natural enemies 4 Nematoda 4 Pathogens 4