Aspects influencing the occurrence of infectious diseases in southern Africa -- Vectors: ticks -- Vectors: tsetse flies -- Vectors: muscidae -- Vectors: tabanidae -- Vectors: culicoides spp. -- Vectors: mosquitoes -- Classification, epidemiology and control of arthropod-borne viruses -- Vaccines, herd immunity and economics: considerations in the control of infectious diseases -- Genetic resistance of livestock to infectious diseases and parasites -- Important role of wildlife in the occurrence of livestock diseases in southern Africa -- Protozoal diseases