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June 28, 1941


JAMA. 1941;116(26):2855-2856. doi:10.1001/jama.1941.02820260029010

Progress in the epidemiologic control of trichinosis is reported by McNaught and Zapater1 of Stanford University Medical School. Statistics collected from human necropsies a few years ago suggested that nearly 18 per cent2 of all American adults are infected with Trichinella spiralis. This percentage varies in different localities, an incidence of 27.6 per cent being recorded in Boston,3 24 per cent in San Francisco,4 falling to as low as 3.5 per cent for New Orleans,5 with other cities taking an intermediate position. In each locality the incidence of trichinosis in man is closely correlated with that in the local pork supply; hogs in the vicinity of Boston, for example, showed an incidence as high as 18 per cent, with the percentage falling to from 0.1 to 0.8 for New Orleans.6 This percentage is apparently determined by local methods of feeding; the highest percentage of