International Commission on Trichinellosis: Recommendations on pre-harvest control of Trichinella in food animals

Transmission of Trichinella to domestic livestock, notably pigs, is limited to certain risk factors including feeding of raw meat-containing waste products or animal carcasses and exposure to infected rodents and wildlife. Prevention of infection in food animals is dependent on eliminating risk of exposure to these potential sources of Trichinella. By implementing conditions of controlled management, pig herds can be considered to pose a negligible risk for Trichinella, and groups of herds which follow these same conditions can be considered to be a compartment with negligible risk for Trichinella. Pork from pigs originating from a negligible risk herd or compartment would not require further testing or processing to protect consumers from this parasite. Verifying the status of pigs from a controlled management negligible risk herd or compartment can be accomplished by a program of regular audits or by implementing surveillance testing of a statistical sample of pigs from the herd or compartment.