The document summarizes the morphology, life cycles, epidemiology, pathology, diagnosis, treatment and control of three intestinal trematodes: Fasciolopsis buski, Heterophyes heterophyes, and Metagonimus yokogawai. F. buski is the largest fluke that lives in the small intestine and releases eggs that develop in snails and freshwater plants consumed by humans. H. heterophyes and M. yokogawai have similar indirect life cycles involving snails and infected fish as intermediate hosts. They can cause abdominal pain, diarrhea and granulomatous lesions as adults in the intestine. Diagnosis is by identifying eggs in stool and treatment is praziquantel