Pathogenesis, pathology and economic lossess of parasitosis. Clinical and laboratory diagnosis of parasitosis. Basis of the direct and indirect prophylaxis of parasitosis. Antiparasitics: chemical groups, mode of action, characteristics, dosages, modalities and precautions to use and withdrawal periods of anthelmintic, antiprotozoal and insecticides. Etiology, epidemiology, pathogenesis, clinical signs, pathological findings, diagnosis, control and therapy of endo and ectoparasitosis of sheep, goats, cattle, horses, pigs,chickens dogs and cats