Tapeworm infection - beef or porkTeniasis; Pork tapeworm; Beef tapeworm; Tapeworm; Taenia saginata; Taenia solium; Taeniasis
Beef or pork tapeworm infection is an infection with the tapeworm parasite found in beef or pork.
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 (3.5 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 pass 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.
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 diagnosis of an infection include:
- CBC, including differential count
A complete blood count (CBC) test measures the following:The number of red blood cells (RBC count)The number of white blood cells (WBC count)The tota...Read Article Now Book Mark Article
- Stool exam for eggs of T solium or T saginata, or bodies of the parasite
Tapeworms are treated with medicines taken by mouth, usually in a single dose. The drug of choice for tapeworm infections is praziquantel. Niclosamide can also be used, but this medicine is not available in the United States.
With treatment, the tapeworm infection goes away.
In rare cases, worms can cause a blockage in the intestine.
Blockage in the intestine
Intestinal obstruction is a partial or complete blockage of the bowel. The contents of the intestine cannot pass through it.Read Article Now Book Mark Article
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.
Cysticercosis is an infection by a parasite called Taenia solium (T solium). It is a pork tapeworm that creates cysts in different areas in the body...Read Article Now Book Mark Article
A seizure is the physical findings or changes in behavior that occur after an episode of abnormal electrical activity in the brain. The term "seizure...Read Article Now Book Mark Article
When to Contact a Medical Professional
Call for an appointment with your health care provider if you pass something in your stool that looks like a white worm.
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 a reliable because it may not kill all eggs.
- Wash hands well after using the toilet, especially after a bowel movement.
Bogitsh BJ, Carter CE, Oeltmann TN. Intestinal tapeworms. In: Bogitsh BJ, Carter CE, Oeltmann TN, eds. Human Parasitology. 5th ed. London, UK: Elsevier Academic Press; 2019:chap 13.
Fairley JK, King CH. Tapeworms (cestodes). In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 289.
Digestive system organs - illustration
The digestive system organs in the abdominal cavity include the liver, gallbladder, stomach, small intestine and large intestine.
Digestive system organs
Review Date: 8/25/2019
Reviewed By: Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School; Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital, Boston, MA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.