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Trichinella spiralis
Thesaurus| Noun | 1. |  Trichinella spiralis - parasitic nematode occurring in the intestines of pigs and rats and human beings and producing larvae that form cysts in skeletal musclestrichinanematode, nematode worm, roundworm - unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic |
Trichinella spiralis
Trich·i·nel·la spi·ra·listhe pork or trichina worm, a species of parasites that cause trichinosis, found in most regions of the world but more frequently in the Northern Hemisphere; transmission occurs as a result of ingesting raw or inadequately cooked meat (especially pork but now often associated with game animals such as bear or walrus) that contains encysted larvae that develop into adults that survive in the jejunum and ileum for approximately 6 weeks; the female worm is viviparous, and bears approximately 1500 embryonic larvae that are laid deep in the mucosa so that they are picked up in the submucosal capillaries and are transported via the liver to the heart, lungs, and systemic circulation; eventually the larvae break out of the body capillaries, penetrate a muscle fiber, coil, and encyst, thereby inducing the strong sensitization, pain, fever, edema, and eosinophilic reaction characteristic of trichinosis.Trichinella spiralis Parasitology A globally distributed nematode that causes trichinosis, which is found in carnivore and omnivore muscle after ingestion of larvae in undercooked meat–especially bear and pig meats Morphology 1.5 mm, thinner in the front; the anus is subterminal. See Trichinosis. Trich·i·nel·la spi·ra·lis (trik'i-nel'ă spī-rā'lis) The pork or trichina worm, a species of parasites that cause trichinosis, found in most regions of the world but more frequently in the Northern Hemisphere; transmission occurs as a result of ingesting raw or inadequately cooked meat (especially pork but now often associated with game animals such as bear or walrus) that contains encysted larvae that develop into adults that survive in the jejunum and ileum for approximately 6 weeks; the female worm is viviparous, and bears approximately 1500 embryonic larvae that are laid deep in the mucosa so that they are picked up in the submucosal capillaries and are transported via the liver to the heart, lungs, and systemic circulation; eventually the larvae break out of the body capillaries, penetrate a muscle fiber, coil, and encyst, thereby inducing the strong sensitization, pain, fever, edema, and eosinophilic reaction characteristic of trichinosis.  TRICHINELLA SPIRALIS: Encysted in muscle tissue (×800)TRICHINELLA SPIRALISTrichinella spiralisThe species of Trichinella that commonly infests humans, causing trichinosis. Infection occurs when raw or improperly cooked meat, particularly pork and wild game, containing cysts is eaten. Larvae excyst in the duodenum and invade the mucosa of the small intestine, becoming adults in 5 to 7 days. After fertilization, each female deposits 1000 to 2000 larvae, which enter the blood or lymph vessels and circulate to various parts of the body where they encyst, esp. in striated muscle. See: illustrationillustrationSee also: TrichinellaTrich·i·nel·la spi·ra·lis (trik'i-nel'ă spī-rā'lis) The pork or trichina worm, a species of parasites that cause trichinosis, found in most regions of the world but more frequently in the Northern Hemisphere; transmission occurs as a result of ingesting raw or inadequately cooked meat (especially pork but now often associated with game animals such as bear or walrus). Trichinella spiralis
Synonyms for Trichinella spiralisnoun parasitic nematode occurring in the intestines of pigs and rats and human beings and producing larvae that form cysts in skeletal musclesSynonymsRelated Words- nematode
- nematode worm
- roundworm
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