82 PARASITIC AMGEB.E OF MAN. 



result of infection with Entamceba coli, we cannot 

 accept them as proof of the pathogenic character of 

 this species. 



Since the observations of Schaudinn and myself, 

 numerous investigations have confirmed the occur- 

 rence of amoeba?, answering to the description of 

 Entamceba coli, in a large proportion of healthy 

 individuals. I believe that a considerable propor- 

 tion of healthy individuals in almost any locality 

 will be found to harbor Entamoeba coli if the 

 examination is carefully made. Schaudinn found 

 this species in 50 per cent, of healthy individuals 

 examined in West Prussia; in 20 per cent, examined 

 in Berlin, and in 66 per cent, of those examined along 

 the shores of the Adriatic; Craig in 65 per cent, of 

 healthy American soldiers at San Francisco; Vedder 

 in 50 per cent, of healthy American soldiers and in 

 72 per cent, of Filipino Scouts in Mindanao, P. I.; 

 and Ashburn and Craig in 71 per cent, of healthy 

 American soldiers in Manila, P. I. Our observations 

 have since been confirmed by Major Whitmore, who 

 found this parasite present in the Philippines, as 

 well as by Hartmann. The percentage varies in dif- 

 ferent localities, but it is evident that Entamceba coli 

 is a common parasite of man and that it does 

 not produce the symptoms or lesions of amoebic 

 dysentery. 



