Observations on the Migration of Avian Schistosomes in Mammals Previously Unexposed to Cercariae

Abstract

The cercariae of schistosomes which normally reach the adult stage in birds have long been known to be able to penetrate the skin of man and various other mammals. When these cercariae penetrate man they may cause a severe papular dermatitis which has been the subject of extensive investigations over a period of many years (Cort, 1950). Vogel (1930) and Brackett (1940) studied biopsies of typical papules caused by avian schistosomes in the human skin and found that the worms remained in the