trichina


tri·chi·na

noun \tri-ˈkī-nə\
plural tri·chi·nae\-(ˌ)nē\ also tri·chi·nas

Definition of TRICHINA

:  a small slender nematode worm (Trichinella spiralis) that is a parasite of flesh-eating mammals (as humans and swine) with larvae that migrate from the intestines to striated muscles where they become encysted
tri·chi·nal \-nəl\ adjective

Origin of TRICHINA

New Latin, from Greek trichinos made of hair, from trich-, thrix hair
First Known Use: 1835

tri·chi·na

noun \tri-ˈkī-nə\   (Medical Dictionary)
plural tri·chi·nae \-(ˌ)nē\ also tri·chi·nas

Medical Definition of TRICHINA

: a small slender nematode worm of the genus Trichinella (T. spiralis) that as an adult is a short-lived parasite of the intestines of a flesh-eating mammal (as a human being, rat, or pig) where it produces immense numbers of larvae which migrate to the striated muscles either directly or through the blood, establish themselves in or between the muscle fibers where they become encysted and may persist for years, and if consumed by a new host in raw or insufficiently cooked meat are liberated by the digestive processes and rapidly become adult to initiate a new parasitic cycle—see trichinosis

trichina

noun    (Concise Encyclopedia)

Trichina encysted in muscle—Russ Kinne/Photo Researchers

Species (Trichinella spiralis) of parasitic nematode, found worldwide, that causes the disease trichinosis. Trichinae (or trichinas), 0.06–0.2 in. (1.5–4 mm) long, mate in the host's small intestine. Fertilized females penetrate the intestinal wall and release larvae, which the blood carries throughout the body. The larvae grow, mature, and become encysted within muscle tissue. The digestive juices of an animal that eats the muscle tissue break down the cyst, liberating the larvae for further development; the worms mature, and the cycle begins again.

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