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Trichinellosis is a disease of animals and humans caused by small intramuscular parasitic nematodes (roundworms) of the genus Trichinella. Infective larvae are transferred from host to host by the consumption of raw or undercooked meat. Historically, human trichinellosis has been associated with the consumption of meat from T. spiralis-infected swine, and regulations to detect and control trichinellosis in pigs have been in place in many countries for over 100 years.

In Canada, trichinellosis is a reportable disease under the Health of Animals Act, and all cases must be reported to the Canadian Food Inspection Agency (CFIA).

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