Tapeworm infection - beef or pork
Definition
Beef or pork tapeworm infection is an infection with the tapeworm parasite found in beef or pork.
Alternative Names
Teniasis; Pork tapeworm; Beef tapeworm; Tapeworm; Taenia saginata; Taenia solium; Taeniasis
Causes
A tapeworm infection is caused by eating the raw or undercooked meat of infected animals. Cattle usually carry Taenia saginata (T saginata). Pigs carry Taenia solium (T solium).
In the human intestine, the young form of the tapeworm from the infected meat (larva) develops into the adult tapeworm. A tapeworm can grow to longer than 12 feet (3.6 meters) and can live for years.
Tapeworms have many segments. Each segment is able to produce eggs. The eggs are spread alone or in groups and can be passed out with the stool or through the anus.
Adults and children with pork tapeworm can infect themselves if they have poor hygiene. They can ingest tapeworm eggs they pick up on their hands while wiping or scratching their anus or the skin around it.
Those who are infected can expose other people to T solium eggs, usually through food handling.
Symptoms
Tapeworm infection usually does not cause any symptoms. Some people may have abdominal discomfort.
People often realize they are infected when they pass segments of the worm in their stool, especially if the segments are moving.
Exams and Tests
Tests that may be done to confirm the diagnosis of an infection include:
- CBC, including white blood cell differential count
- Stool exam for eggs of T solium or T saginata, or the worm itself
Treatment
Tapeworms are treated with medicines taken by mouth, usually in a single dose. The medicine of choice for tapeworm infections is praziquantel.
Outlook (Prognosis)
With treatment, the tapeworm infection goes away.
Possible Complications
In rare cases, worms can cause a blockage in the intestine.
If pork tapeworm larvae move out of the intestine, they can cause local growths and damage tissues such as the brain, eye, or heart. This condition is called cysticercosis. Infection of the brain (neurocysticercosis) can cause seizures and other nervous system problems.
When to Contact a Medical Professional
Contact your health care provider if you pass something in your stool that looks like a white worm.
Prevention
In the United States, laws on feeding practices and the inspection of domestic food animals have largely eliminated tapeworms.
Measures you can take to prevent tapeworm infection include:
- Do not eat raw meat.
- Cook whole cut meat to 145°F (63°C) and ground meat to 160°F (71°C). Use a food thermometer to measure the thickest part of the meat.
- Freezing meat is not reliable because it may not kill all eggs.
- Wash hands well after using the toilet, especially after a bowel movement.
References
Fairley JK, O'Connell EM. Tapeworms (cestodes). In: Blaser MJ, Cohen JI, Holland SM, et al, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 10th ed. Philadelphia, PA: Elsevier; 2026:chap 295.
Fischer PR, White AC. Adult tapeworm infections. In: Kliegman RM, St. Geme JW, Blum NJ, et al, eds. Nelson Textbook of Pediatrics. 22nd ed. Philadelphia, PA: Elsevier; 2025:chap 348.
White AC, Brunetti E. Cestodes. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 325.
|
Review Date:
8/5/2025 Reviewed By: Jatin M. Vyas, MD, PhD, Roy and Diana Vagelos Professor in Medicine, Columbia University Vagelos College of Physicians and Surgeons, Division of Infectious Diseases, Department of Medicine, New York, NY. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. |
© 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
All rights reserved.