[The etiology of sylvatic trichinellosis in Switzerland].

Three Trichinella strains from Swiss wild foxes (Vulpes vulpes) were tested in crossbreeding experiments with Trichinella spiralis, T. nativa and T. nelsoni using white mice as laboratory animals. The results demonstrated that T. nelsoni Britov et Boev 1972 is the etiologic agent of sylvatic trichinellosis in Switzerland. Former isolations of these species were successful in materials from East and South Africa, USSR (Republics of Tadzhikistan, Turkmenia and Kazakhstan) and Bulgaria. The area of T. nelsoni covers probably the whole southern part of the Old World up to the 48th degree of northern latitude.