Tapeworm infection is caused by ingesting food or water contaminated with tapeworm eggs or larvae. If you ingest certain tapeworm eggs, they can migrate outside your intestines and form larval cysts in body tissues and organs (invasive infection). If you ingest tapeworm larvae, however, they develop into adult tapeworms in your intestines (intestinal infection).
An adult tapeworm consists of a head, neck and chain of segments called proglottids. When you have an intestinal tapeworm infection, the tapeworm head adheres to the intestine wall, and the proglottids grow and produce eggs. Adult tapeworms can live for up to 20 years in a host. Intestinal tapeworm infections are usually mild, but invasive larval infections can cause serious complications.
Dec. 20, 2011
- King CH, et al. Cestodes (tapeworms). In: Mandell GL, et al. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, Pa.: Churchill Livingstone Elsevier; 2010. http://www.mdconsult.com/books/about.do?about=true&eid=4-u1.0-B978-0-443-06839-3..X0001-X--TOP&isbn=978-0-443-06839-3&uniqId=230100505-57. Accessed Nov. 15, 2011.
- White AC Jr., et al. Cestodes. In: Goldman L, et al. Cecil Medicine. 24th ed. Philadelphia, Pa.: Saunders Elsevier; 2011. http://www.mdconsult.com/das/book/body/191371208-2/0/1492/0.html#. Accessed Nov. 16, 2011.
- Craig P, et al. Intestinal cestodes. Current Opinion in Infectious Diseases. 2007;20:524.
- Leder K, et al. Intestinal tapeworms. http://www.uptodate.com/home/index.html. Accessed Nov. 16, 2011.
- White AC Jr. Clinical manifestations and diagnosis of cysticercosis. http://www.uptodate.com/home/index.html. Accessed Nov. 16, 2011.
- White AC Jr. Treatment of cysticercosis. http://www.uptodate.com/home/index.html. Accessed Nov. 16, 2011.
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