Taenia saginata
Taenia saginata, commonly known as the beef tapeworm, is a species of parasitic flatworms belonging to the class Cestoda. It is one of the most common tapeworms that infect humans, primarily in regions where beef is consumed raw or undercooked.
Life Cycle
The life cycle of Taenia saginata involves two hosts. The primary host is humans, who harbor the adult worm in the intestine, while the intermediate host is cattle, in which the larval stage (cysticercus) develops in the muscles.
Morphology
Taenia saginata is a large tapeworm, measuring up to 10 meters in length. It consists of a head (scolex), neck, and a series of segments (proglottids). The scolex has four suckers but lacks hooks and rostellum, which distinguishes it from other species of Taenia.
Pathogenesis and Clinical Features
Infection with Taenia saginata, known as taeniasis, is usually asymptomatic. However, some individuals may experience abdominal discomfort, weight loss, and other nonspecific symptoms. The definitive diagnosis is made by identifying characteristic proglottids or eggs in the stool.
Prevention and Control
Prevention of Taenia saginata infection primarily involves proper cooking of beef to kill the cysticerci. Other measures include improved sanitation and health education.
Treatment
The drug of choice for treating Taenia saginata infection is praziquantel. Other drugs such as niclosamide can also be used.
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