Cysticercosis (SIS-tuh-sir-KO-sis) is a potentially serious disease of humans caused when people ingest the eggs of a tapeworm that lives in the intestines of other humans. This tapeworm, Taenia solium, is sometimes called the “pork tapeworm” because people get this type of tapeworm from eating undercooked pork. If a pig swallows the eggs of the tapeworm (passed in human feces), the pig doesn’t develop a tapeworm in its intestines. Instead, it develops microscopic capsules (called cysts) in its muscles that contain larval tapeworms. These cysts don’t make the pig sick, but people who eat raw or undercooked pork products containing these cysts develop the tapeworm and begin passing eggs in their stools as well.

Taeniasis (TEE-nahy-uh-sis) is the presence of one or more tapeworms in the intestines. People get this tapeworm by eating cysts in undercooked pork. Most people who have the tapeworm in their intestines won’t have any symptoms, but in some cases (especially if they have many tapeworms) they may develop nausea, diarrhea, abdominal pain, fever, or constipation. A tapeworm can live in an infected person’s intestines and continue to produce eggs for 25 years! The tapeworms begin shedding eggs five to twelve weeks after the tapeworm cyst was ingested in undercooked pork. People carrying living tapeworms in their intestines will shed tapeworm eggs every day in their stool; each tapeworm can produce 250,000 eggs per day. These eggs can infect other people or pigs as soon as they are shed in the stool. The eggs they shed can survive a few weeks or months in the environment. People carrying tapeworms can be diagnosed by having their stools examined in a laboratory to look for tapeworm eggs. Infected people can be treated with medication to kill the tapeworms. The stools should be examined frequently for several months to be sure all of the tapeworms have been killed.Continue Reading Cysticercosis – Pork Tapeworm