Humans can get these worms after eating the undercooked meat of an infected animal. This includes infected pork, beef, or fish. Dogs and cats can also get tapeworms, but their infections rarely pass to humans. Oftentimes, dogs and cats get an infection after swallowing a parasite-contaminated flea.
How does a human get a tapeworm?
Tapeworm infection is caused by ingesting food or water contaminated with tapeworm eggs or larvae. If you ingest certain tapeworm eggs, they can migrate outside your intestines and form larval cysts in body tissues and organs (invasive infection).
How long does it take for tapeworms to develop in humans?
Humans become infected by eating raw or undercooked infected beef or pork. Once ingested, cysticerci attach to the small intestine and develop into adult tapeworms over the course of 2 months. The adult tapeworms produce proglottids that mature, detach, and migrate to the anus and are then passed in the feces.
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