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- Taenia saginata is a beef tapeworm that causes intestinal taeniasis saginata in humans.
- It has a cosmopolitan distribution and humans are the only definitive host.
- Cattle, buffalo, and camel serve as intermediate hosts.
- The parasite inhabits the upper part of the small intestine.
- Adult worms can measure up to 10 meters and have 3000-4000 segments.
- The diagnostic stage is the gravid segment, which releases eggs in the feces.
- Humans become infected by ingesting raw or undercooked beef containing the infective stage, cysticercus bovis.
- Cattle become infected by ingesting gravid segments or eggs in areas contaminated with human feces.
- The oncosphere hatches in the cattle intestine and develops into cysticercus bovis, which can remain viable for up to a year.
- Cysticerci can form fibrous capsules in host tissues and may become calcified over time.
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