Abstract
There has been a striking reduction in prevalence, mortality, and severity of infection due to Trichinella spiralis in man and pigs during the past 25 years. The factors of importance are associated with legislation requiring heat treatment of garbage used in swine feeding, reduction in the per capita consumption of pork, the extensive use of low-temperature storage of pork, increased consumption of ready-to-eat pork products, and public awareness of proper methods of cooking pork. Nevertheless, sporadic cases and epidemics still occur and frequently are the result of carelessness in the home feeding, processing, and serving of one or more pigs raised for personal use. It is probable that the present adult infection rate in the United States is 4% or less compared to 15% or 20% 25 years ago.
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