Infections of the intestines with a parasite. They are caused most commonly by intestinal nematodes (roundworms) and cestodes (tapeworms). (From Merck Manual, 15th ed; Dorland, ...
Class of parasitic flukes consisting of three subclasses, Monogenea, Aspidogastrea, and Digenea. The digenetic trematodes are the only ones found in man. They are endoparasites ...