Trichinosis is parasitic disease of animals and humans (zoonosis) which is caused by a parasite from the Trichinella genus. The most common species is Trichinella spiralis, which in animals, unlike in humans, usually passes asymptomatic. It is present all over the world, and it represents a significant public health problem. People become infected by eating raw or inadequately cooked meat. Last few years the Republic of Croatia decreased the number of infected cases, as a result of systematic implementation of preventive measures. In the world 8 species exist, in fact 11 genotypes Trichinella. In Croatia, following species are identified: T. spiralis, T. britovi i T. pseudospiralis. Trichinosis in nature is maintained in two cycles: sylvatic and synantropic. These two cycles are often overlapped which enables permanently control suppression of this disease.