Taeniasis

Taeniasis refers to intestinal infection of humans by adult tapeworms of the genus Taenia, including the species T. solium (pork tapeworm), T. saginata (beef tapeworm), and T. asiatica (Asian tapeworm). Adult worms reside in the human intestine, and infection is distinct from cysticercosis, which results from tissue invasion by larval stages. ^[1]

Taeniasis is generally asymptomatic or associated with only mild symptoms. When present, manifestations may include abdominal pain, weight loss, and the passage of tapeworm segments (proglottids) in stool; heavy T. solium infections may produce anaemia and indigestion. ^[1] Adult worms develop over approximately eight weeks following ingestion of infective larval stages and can persist for years in the absence of treatment. ^[1]

Taeniasis, together with cysticercosis, affects an estimated 50 million people globally, and the disease is most common in the developing world. ^[1] In the United States, fewer than 1,000 cases are reported annually. ^[1] In rural endemic hotspots of Vietnam, true prevalence of taeniasis has been estimated at up to 13% in humans, with cases documented across 60 of 63 provinces. ^[3] Taenia solium cysticercosis is endemic in most developing regions where pigs are raised and consumed, and is one of the few parasitic diseases targeted for eradication. ^[4]

Human taeniasis is acquired by eating undercooked meat containing larval cysts: T. saginata from contaminated beef, and T. solium and T. asiatica from contaminated pork. ^[1] Cysticercosis—the principal complication of pork tapeworm taeniasis—occurs when T. solium eggs are ingested, typically via vegetables or water contaminated by feces from a tapeworm carrier, after which larvae disseminate through the bloodstream to tissues. ^[1]

Prevention relies on thoroughly cooking meat, freezing it at −10 °C for five days, and ensuring that human feces do not contaminate pig feed or the environment. ^[1] Complementary measures include treating active human cases, vaccinating and treating pigs, enforcing meat-inspection standards, and health education on hand hygiene, especially for food handlers. ^[1] Preventive chemotherapy with single-dose praziquantel 10 mg/kg, niclosamide 2 g, or albendazole 400 mg per day for three consecutive days has shown high cure rates against T. solium taeniasis in endemic populations. ^[2]

1. 1Wikipedia contributors. Taeniasis - Wikipedia [Internet]. Wikipedia. cited 3 Sept 2026.Available from: https://en.wikipedia.org/wiki/Taeniasis
2. 2Haby MM et al. Systematic review of the effectiveness of selected drugs for preventive chemotherapy for Taenia solium taeniasis. PLoS Negl Trop Dis. 2020 Jan. PMID: 31945055. doi: 10.1371/journal.pntd.0007873.PubMed: https://pubmed.ncbi.nlm.nih.gov/31945055/
3. 3Ng-Nguyen D et al. A systematic review of taeniasis, cysticercosis and trichinellosis in Vietnam. Parasit Vectors. 2017 Mar 21. PMID: 28320455. doi: 10.1186/s13071-017-2085-9.PubMed: https://pubmed.ncbi.nlm.nih.gov/28320455/
4. 4Garcia HH et al. Taenia solium Cysticercosis and Its Impact in Neurological Disease. Clin Microbiol Rev. 2020 Jun 17. PMID: 32461308. doi: 10.1128/CMR.00085-19.PubMed: https://pubmed.ncbi.nlm.nih.gov/32461308/
5. 5Carod JF et al. Cysticercosis in Madagascar. J Infect Dev Ctries. 2020 Sep 30. PMID: 33031077. doi: 10.3855/jidc.13450.PubMed: https://pubmed.ncbi.nlm.nih.gov/33031077/