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Medical Health Encyclopedia
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Trichinosis

Acid Reflux DrugsAcid Reflux SymptomsIBD Symptoms



Trichinella spiralis in human muscle
Trichinella spiralis in human muscle
Digestive system organs
Digestive system organs


Trichinosis

Definition:

Trichinosis is a roundworm (Trichinella spiralis) infection, usually contracted by eating raw or undercooked meat.

Alternative Names:
Trichiniasis; Trichinellosis

Text Continues Below



Causes, incidence, and risk factors:

Trichinosis is a parasitic disease that results from eating undercooked meat, most frequently pork, which contains cysts of Trichinella spiralis. T. spiralis can be found in pork, bear, fox, rat, horse and lion meat.

Trichinosis is a common infection worldwide, but it is seldom seen in the United States because of regulations regarding the feeding of domestic animals and meat-processing inspections.

When a person eats meat from an infected animal, trichinella cysts hatch in the intestines and grow into adult roundworms, which measure 2-4 mm long.

The roundworms then produce offspring that migrate through the gut wall and into the bloodstream. These parasites tend to invade muscle tissues, including the heart and diaphgragm (the breathing muscle under the lungs). They can also affect the lungs and brain.

Domestic meat animals (hogs) raised specifically for consumption under USDA guidelines and inspection can be considered safe. Wild animals, especially carnivores (meat eaters) or omnivores (animals that eat both meat and plants), should be considered a possible source of roundworm disease.

There are approximately 40 cases per year in the US.

Risk factors include eating meat from wild game.



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