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Cestodiasis is caused by cestodes (tape worm)


Taeniasis is caused by the species belonging to the genus Taenia which include mainly Taenia solium (pork tapeworm) and T.saginata (beef tape worm).  Man acquires the infection by eating raw or undercooked pork or beef that contains the larvae. The larvae develop in to adult tapeworms in the intestine of man.  The presence of tapeworms in the intestine causes gastrointestinal disorders.  Occasionally it causes abdominal discomfort, chronic indigestion, anemia and intestinal disorders.

Echinococcosis (Hydatid cyst):

Echinococcosis is an infection caused by Echinococcus granulosus. The definitive hosts are dog, wolf and fox. Man acquires the infection on eating food or drinking water contaminated with onchosphere-containing eggs. Larvae released from the eggs penetrate the wall of the gut, enter the blood stream and disseminate to deep organs such as liver, lungs where they grow to form hydatid cysts. It causes hepatomegaly and lead to jaundice. Rupture of the cyst causes hypersensitivity reaction. 
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