Taenia saginata

Taenia

 [te´ne-ah]

a genus of tapeworm. See figure at tapeworm.

Taenia sagina´ta a species 4 to 8 meters long, found in the adult form in the human intestine and in the larval state in muscles and other tissues of cattle and other ruminants; human infection usually results from eating inadequately cooked beef.

Taenia so´lium a species 2 to 4 meters long, found in the adult intestine of humans; the larval form most often is found in muscle and other tissues of the pig. Human infection results from eating inadequately cooked pork.

Tae·ni·a sa·gi·na·'ta

the beef, hookless, or unarmed tapeworm of humans, acquired by eating insufficiently cooked flesh of cattle infected with Cysticercus bovis.

Taenia saginata

a species of tapeworm that inhabits the tissues of cattle during its larval stage and infects the intestine of humans in its adult form. T. saginata may grow to a length of between 12 and 25 feet and is the tapeworm species that most often infects humans. Also called beef tapeworm. See also tapeworm, tapeworm infection.

beef tapeworm

The most common intestinal tapeworm to affect humans, which is acquired from infected, poorly cooked beef, which measures up to 3.6–7.5 m in length.
 
Clinical findings
Weight loss, loss of appetite, abdominal pain, nausea, constipation, chronic indigestion, diarrhea, headaches, vertigo.
 
Epidemiology
Infestation rarely occurs where public health officials conduct regular and rigourous inspection of meat, but is relatively common outside of North America and Western Europe.

Diagnosis
Stool examination for parasite eggs.

Management
Praziquantel.

Tae·ni·a sa·gi·na·ta

(tē'nē-ă saj-i-nā'tă)

The beef, hookless, or unarmed tapeworm of humans, acquired by eating insufficiently cooked beef or veal infected with Cysticercus bovis.

TAENIA SAGINATA: beef tapeworm (orig. mag. ×100)

Taenia saginata

A species whose larvae live in cattle. The adult worm lives in the small intestine of humans, who acquire it by eating insufficiently cooked beef infested with the encysted larval form (cysticercus or bladderworm). Adult worms may reach a length of 15 to 20 ft (4.6 to 6.1 m) or longer.

Synonym: beef tapeworm; unarmed tapeworm See: illustration

See also: Taenia

Taenia

a genus of cyclophyllidean tapeworms of the family Taeniidae. The adult tapeworm inhabits the intestine of carnivores, the larval stage (metacestode) invades the tissues of a variety of animals, in some cases humans. They cause some economic loss due to condemnation of offal, but their greatest importance is their zoogenetic potential, and the preoccupation of humans with the danger of becoming infected.

Tapeworms and their hosts are listed below, but species whose intermediate hosts are unknown are: T. bubesi (lion), T. crocutae (spotted hyena), T. erythraea (black-backed jackal), T. gongamai and T. hlosei (lion and cheetah), T. lycaontis (hunting dog), T. regis (lion).

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Taenia brauni

adult tapeworms in dogs and jackals and the larval stage (coenurus) in rats, mice and porcupines. It is probably a subspecies of T. serialis.

Taenia crassiceps

adult tapeworms in foxes and coyotes, the larval stage (cysticercus) in rodents.

Taenia hydatigena

tapeworms in small intestine of dogs, wolves and wild Carnivora, and the larval stage, Cysticercus tenuicollis, found in the sheep and other ruminants, and in pigs and occasionally primates.

Taenia hyenae

tapeworms are in hyenas and the cysticerci in antelopes.

Taenia krabbei

adult tapeworms are found in the dog and in wild carnivores and the larval cestode, Cysticercus tarandi, in the muscles of wild ruminants, especially deer.

Taenia laticollis

tapeworms found in carnivores and larval forms in rodents. Possibly a synonym for T. pisiformis.

Taenia macrocystis

adult tapeworms in lynx and coyote, and the intermediate stage in snowshoe lagomorphs.

Taenia martis

the adult tapeworms in the marten and the cysticercus in the vole.

Taenia multiceps (syn. Multiceps multiceps)

the adult tapeworms are found in the dog and wild canids, the larvae, Coenurus cerebralis, in the brain and spinal cord of sheep and goat.

Taenia mustelae

adult tapeworms in martens, weasels, otters, skunks, badgers and larval stages in voles and other rodents.

Taenia omissa

adult tapeworms in the cougar and larvae in deer.

Taenia ovis

adult tapeworms are found in dogs and wild carnivores and the larval stage, Cysticercus ovis, in the skeletal and cardiac muscles of sheep and goats.

Taenia parva

adult tapeworms in genets, larval stage in rodents.

Taenia pisiformis

adult tapeworms found in small intestine of dog, fox, some wild carnivores, and very rarely in cats. The metacestode stage (Cysticercus pisiformis) found in lagomorphs, in the liver and peritoneal cavity.

Taenia polyacantha

adults are in the intestine of foxes and the metacestodes in microtine rodents.

Taenia rileyi

adult tapeworms found in lynx, larvae in rodents.

Taenia saginata

adult tapeworms are intestinal parasites of humans, and the metacestode (Cysticercus bovis) in cattle and some wild ruminants.

Taenia serialis

the adult tapeworm is found in dogs and foxes and the metacestode, Coenurus serialis, in the subcutaneous and intramuscular tissues of lagomorphs.

Taenia serrata

see T. pisiformis (above).

Taenia solium

the adults are found in the small intestine of humans and some apes, the metacestode (Cysticercus cellulosae) in the skeletal and cardiac muscle of pigs and in the brain of humans.

Taenia taeniaeformis

the adult is found in the small intestine of cats and other related carnivores and the metacestode (Cysticercus fasciolaris) in the livers of rodents.

Taenia twitchelli

adult tapeworms found in wolverines, larvae in lungs and pleural cavity of porcupines.