Trichina - Maturity

A small roundworm (Trichinella spiralis), parasitic in the human small intestine; infection usually results from eating raw or undercooked pork. (Phylum: Nematoda.)

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Maturity

The small adult worms mature in the intestine of an intermediate host such as a pig. Each adult female produces batches of up to 1,500 live larvae, which bore through the intestinal wall, enter the blood and lymphatic system, and are carried to striated muscle tissue.

Larvae encysted in the muscles remain viable for some time. the released larvae migrate to the intestine to begin a new life cycle. Female trichina worms live about six weeks and in that time may release 15,000 larvae. The migration and encystment of larvae can cause fever, pain, and even death.