Taeniasis is an intestinal infection in humans caused by adult parasitic tapeworms from the *Taenia* genus (e.g., *Taenia saginata*, *Taenia solium*, *Taenia asiatica*). It is most common in regions where raw or undercooked beef or pork is consumed, and where sanitation practices are inadequate, affecting individuals globally.
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Tapeworm infections, including Taeniasis, have been recognized since ancient times, with descriptions found in ancient Egyptian and Greek medical texts. The life cycles of the *Taenia* tapeworms and their link to meat consumption were largely elucidated in the 19th century, leading to better understanding and control measures.
Humans acquire Taeniasis by consuming raw or undercooked beef (*Taenia saginata*) or pork (*Taenia solium*, *Taenia asiatica*) containing larval cysts called cysticerci. Once ingested, these cysts develop into adult tapeworms in the human intestine. Livestock become infected by ingesting tapeworm eggs present in contaminated pasture or feed.
Contagious Period: Varies by disease
Local health department information and state-specific prevention guidance
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Whether you live in Wisconsin or are traveling there, knowing the symptoms, timeline, and when to seek care helps you act quickly if exposure occurs.
Seek care if you experience severe dehydration, bloody stools, high fever, or symptoms lasting more than 3 days. Children under 5, adults over 65, and immunocompromised individuals should seek care earlier.
Emergency symptoms: Severe dehydration, inability to keep fluids down for 12 or more hours, or neurological symptoms require emergency care.
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Trusted information from leading health organizations
Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-07-18
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