fish tapeworm infection [AS, fisc, fish] , an infection caused by the tapeworm Diphyllobothrium latum that is transmitted to humans when they eat contaminated raw or undercooked freshwater fish. Fish tapeworm infection is common in temperate zones throughout the world and is found in the Great Lakes region of the United States and Alaska. Endemic foci have been found among Eskimos in Alaska and Canada. Most infections are asymptomatic. However, persons may exhibit abdominal discomfort, vomiting, diarrhea, weight loss, and vitamin B12 deficiency. Treatment is praziquantel and vitamin B12, if indicated, for deficiency. In severe cases intestinal obstruction may result. Also called diphyllobothriasis. See also Diphyllobothrium, tapeworm infection.
