During the year October, 1917, to October, 1918, there were examined at the laboratory of the Walter Reed General Hospital 477 samples of feces for intestinal parasites. In nearly every instance the samples were submitted because the patient had shown some evident or obscure reason for suspecting the presence of intestinal animal parasites, although there are included a number of samples that were sent for examination for typhoid or dysentery bacilli. The 477 stools came from 163 individuals, seventy-two of whom, or 44 per cent., were found to harbor one or more kinds of parasites, while in ninety-one persons, or 56 per cent., no parasites were found.
With the exception of Endameba histolytica, none of these cases of intestinal parasites can be said to possess much medical interest. Their presence is one of greater zoological than medical interest. Next to the ameba infections the hookworm cases are of most interest.