Book excerpt: The distribution of beef and dairy cattle in relation to climatic zones within Australia. Lifecycle and pathogenesis of helminths of lesser economic importance. Lifecycle and pathogenesis of helminths of major economic importance. Factors influencing worm populations in cattle. Epidemiology and control of parasitic gastroenteritis of cattle in the temperate climate zone. Epidemiology and contrl of parasitic gastroenteritis of cattle in the tropical/sub-tropical zone. Anthelmintics for cattle.