AMOEBA OF THE INTESTINAL TRACT. 77 



were in robust health, had never suffered from diar- 

 rhoea or dysentery, and presented no symptoms of 

 either of these diseases. In some the amoeba? occurred 

 in great numbers while in others a long search was 

 required before they were demonstrated. 



My results were confirmed, in 1906, by Captain 

 Vedder of the Army Medical Corps, who examined 

 the feces of 50 healthy American soldiers and 50 

 Filipino Scouts, the examinations being made in 

 the Philippine Islands; of the American soldiers 

 50 per cent, showed Entamceba coli in their feces, 

 while 75 per cent, of the Filipino Scouts were found 

 to be infected with this parasite. Of the subsequent 

 history of the cases examined by him, Vedder says: 

 " All the men have been under observation for a period 

 of nine months, and none of them has developed 

 dysentery." 



Major Ashburn and I, while serving in Manila 

 upon the " Army Board for the Study of Tropical 

 Diseases," examined 107 healthy American soldiers, 

 all of whom were members of the Hospital Corps of 

 the Army and all on active duty at the U. S. Army 

 Division Hospital, Manila, P. I. Of the 107 men, 76 

 of 71+ per cent, were found to be infected with En- 

 t amoeba coli, while two showed the pathogenic En- 

 tamceba histolytica in their stools. None of these 

 men, with the exception of the two showing the patho- 



