78 PARASITIC AMOEBAE OF MAN. 



genie amoeba, had diarrhoea or dysentery at the time 

 of examination, and all denied ever having suffered 

 from dysentery symptoms since residing in the 

 Philippines. Of seventy-two men showing Entamceba 

 coli in their feces, one had resided in the Philippine 

 Islands for eight years; four, seven years; one, six 

 and a half years; three, six years; four, five and a 

 half years ; one, five and one quarter years ; two, five 

 years ; four, four years ; three, three years ; two, two 

 and a half years ; ten, two years ; one, one year and 

 ten months; two, one year and nine months; nine, 

 one and a half years; thirteen, one year; and the 

 remainder, or seventeen, less than one year. 



The two men showing Entamceba Mstolytica in 

 their stools were apparently in good health, but in- 

 quiry elicited the information that both were suffering 

 from dysenteric symptoms at the time of examination, 

 and both were later returned to the United States 

 suffering from chronic amoebic dysentery. At the 

 time that we examined the feces of these men we 

 knew nothing of the occurrence of the dysenteric 

 symptoms, and our diagnosis was based entirely upon 

 the morphology of the amoebae observed in their feces. 

 It will thus be seen, that contrary to the opinion of 

 certain investigators, it is possible to differentiate 

 Entamceba coli from Entamceba Mstolytica as they 

 occur in the feces, and therefore, that such diff eren- 



