Taenia saginata

The beef tapeworm. The most common of the big tapeworms that parasitizes people, contracted from infected raw or rare beef. Can grow to be 12-25 feet (3.6-7.5 m) long in the human intestine. Also known as the African tapeworm.

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the most common of the large tapeworms infecting humans, a species 4 to 8 meters long, found in the adult form in the intestine. The cysticerci (larval stage) develop in the muscles and other tissues of ruminants, and humans become infected by eating raw or rare meat. Called also beef or unarmed tapeworm and T. africana.