The life cycle of T. solium is indirect. It passes through pigs or other animals, as intermediate hosts, into humans, as definitive hosts. Life Cycle. Around and around we go! The life cycle of the beef tapeworm is a bit complicated and has some essential steps to complete its cycle. The process of. Beef tapeworm (Taenia saginata) life cycle, symptoms, diagnosis and treatment ( pictures included). Beef tapeworm causes taeniasis (parasitic disease).

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From Wikipedia, the free encyclopedia. The internal oncosphere contains six refractile hooks. These contaminated tissues are then consumed through raw or undercooked meat.

File:Taenia LifeCycle.gif

Adults attach to the intestinal wall with their scolex using four suckers. Medical Center in Houston, TX. The most striking feature consists of the passage active and passive of proglottids. All had housekeepers from Latin American countries who were suspected to be source of the infections or others handling their food. The secondary host form, human cysticercosis, predominates in areas where poor hygiene allows for mild faecal contamination of food, soil, or water supplies.

There are usually 13 hooks of each size. Infobox medical condition new. The adult tapeworms attach to the small intestine by their scolex and reside in the small intestine. Cysticercosis occurs after ingestion of contaminated food, water, or soil that contain T. The adult releases gravid segments proglottids filled with eggs that are carried away by the digestive tract and released into the saginara through the feces. With the help of digestive enzymes from the penetration glands, they penetrate the intestinal mucosa to enter blood and lymphatic vessels.


Endoscopic treatment is available in some taenai. Taenia solium is more prevalent in poorer communities where humans live in close contact with pigs and eat undercooked pork.

Pathology Outlines – Taenia saginata

Cysts develop in liver and lungs. Enterobius Vermicularis – Pinworm. Taenia solium can also cause cysticercosis. The scolex of T. Taenia saginata [TI] cestodes full text[sb]. The cysticercus is often called the metacestode. Microscopic identification of gravid proglottids or, more rarely, examination of the scolex lifw species determination.

Gravid uterus of T. The gravid proglottids, body segments containing fertilised eggs, are released in the faeces of the zaginata. They are about 16—20 mm long and 5—7 mm wide and each proglottid has its own reproductive organs.

January 10, Content source: Each proglottid is little more than a self-sustainable, very lightly ingestive, reproductive unit ; hence, the tapeworm is a hermaphrodite. The surviving oncospheres preferentially migrate to striated musclesas well as the brainliver, and other tissues, where lf settle to form cysts — cysticerci. Then they are consumed by an intermediate host such as a cow or pig, where they hatch within the duodenum to become larvae, penetrate through the intestinal wall llife nearby blood vesselsand enter the bloodstream.

Heavy infection is indicated by intestinal irritation, anaemiaand indigestion. Retrieved 13 March Taeniasis [Taenia saginata] [Taenia solium] Causal Agents: New author database being installed, click here for details. Get Email Updates To receive email updates about this page, enter your email address: Note the four large suckers and lack of rostellum and rostellar hooks.


Eggs blue arrows can also be seen. Mature proglottid of T. However humans can also act as secondary hosts, which is a more pathological, harmful stage triggered by oral contamination. The eggs are embryonated, walnut brown and about 35 micrometers in diameter having a 6-hooked oncosphere inside its thick shell.

Taeniasis – Wikipedia

In other projects Wikimedia Commons Wikispecies. The Korean Journal of Parasitology.

The eggs develop into oncosphere covered larvae that break through the intestine epithelium and travel through the circulation of the bovine. If a cow the intermediate host feeds on contaminated vegetation, it ingests mature eggs or gravid proglottids. Taeniasis is generally asymptomatic and is diagnosed when a portion of the worm is passed in the stool. Treatment is traditionally done with an oral drug called praziquantel.

Taenia saginata is relatively common in Africa, some parts of Eastern Europe [26]the Philippinesand Latin America. It is the cause of major neurological problems, such as hydrocephalusparaplegymeningitisconvulsionsand even death. Taeniasis is contracted after eating undercooked or raw pork and beef that contain the larvae.

The following other wikis use this file: Migrating proglottids can cause: Diphyllobothrium latum Diphyllobothriasis Cyle erinaceieuropaei Sparganosis Diphyllobothrium mansonoides Sparganosis. This website is intended for pathologists and laboratory personnel, who understand that medical information is imperfect and must be interpreted using reasonable medical judgment.