current rates of human infection in the USA are about 25 cases
each year (1991-1996), with only a portion of these infections
attributable to pigs (5).
Exposure of domestic swine to Trichinella spp. is limited to a
few possibilities including feeding of animal waste products
contaminated with parasites, exposure to rodents or other
wildlife infected with trichinae, or cannibalism within an
infected herd. The use of good production and management
practices for swine husbandry will preclude most risks for
exposure to trichinae in the environment.