Abstract
Two young pigs used by the writer in an attempted experimental infection with Necator americanus proved to be carrying a natural infection of Œsophagostomum dentatum. At the post-mortem examination, one of the animals had 35 females, 22 males, all mature worms, in the cæcum and large intestine, whilst two pairs were in copula. From the cæcal contents of the other pig, one immature female worm was obtained. No nodules were found in the walls of the cæcum or of the large intestine. Droppings containing the eggs of the parasite had been collected for a short time prior to the killing of the pigs, and were used for the cultivation of the larvæ.

This publication has 2 references indexed in Scilit: