Heterophyes heterophyes and metagonimus yokohawai are referred to as the heterophyids. The diagnosis process is driven by eggs in feces. People become infected when they eat undercooked fish so I suggest that everyone cooks their fish. Heavy infections causing mucoid diarrhea can form. Also granulomas sometimes occur. This is treated with praziquantel. Disease names are Heterophyiasis and Metagonimiasis.