Question

Человек является окончательном хозяином в жизненном цикле бычьего цепня?

Answer 1

Человек, является окончательным хозяином в жизненном цикле бычьего цепня

Answer 2

Человек является окончательном хозяином в жизненном цикле бычьего цепня?да

Answer 3

The Life Cycle of Taenia saginatus (Beef Tapeworm)

The definitive host of Taenia saginatus, commonly known as the beef tapeworm, is humans. The intermediate host is cattle.

Taenia saginatus has an indirect life cycle that requires two hosts to complete its life stages. The adult tapeworm lives and reproduces in the small intestine of humans. Eggs are passed in human feces into the environment. If cattle ingest the eggs by grazing on contaminated pastures, the eggs will hatch into larvae (oncospheres) in the cattle's digestive tract.

The larvae will then penetrate the intestinal wall and travel through the bloodstream to various organs and muscles, where they form cysticerci (vesicular cysts). This stage in cattle is called the metacestode stage. Humans can become an intermediate host if they consume undercooked, infected beef containing the cysticerci.

When a human ingests infected beef, the cysticerci are released in the small intestine. The scolex (head region) evaginates and attaches to the intestinal wall using its suckers and hooklets. It then develops into an adult tapeworm. The adult tapeworm can live in the human small intestine for up to 25 years, reproducing through proglottids and releasing egg-filled gravid proglottids into the feces.

In summary, the definitive host is humans, where the adult tapeworm lives in the small intestine. Cattle act as the intermediate host, where the larvae (cysticerci) develop. The life cycle is completed when a human consumes undercooked beef containing the cysticerci larvae.