Abstract
About 20 years ago interest in human trichinosis in the United States was stimulated by Queen's work,1 in which he showed the incidence of infections, as measured by recovery of larvae from human diaphragms by peptic digestion, to be far higher than would be indicated by the reported diagnoses of clinical trichinosis. His study was followed by those of a succession of investigators who used similar techniques. Extensive studies of trichinous infections in men and in hogs were made, notably by Hall and Collins, and others working with Willard Wright at the National Institute of Health.2 It was established that infections by Trichinella spiralis were quite common. Larvae were found in about 16 per cent of the human diaphragms collected in various parts of the United States. Wright, Jacobs and Walton3 concluded that there was no correlation between Trichinella infection and sex, civil or military status, past
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