VIII, B. 4 Walker and Sellards: Entamoebic Dysentery 



301 



experiments and the cases of experimental dysentery are shown 



in the following diagram: 



Diagram. 



Strain A. 

 "Convalescent carrier. " 



I 



2 

 Dysentery. 



29 

 "Contact carrier. 



I 



30 

 Dysentery. 



31 



32 



33 



36 

 'Contact carrier. ' 



41 42 43 



Dysentery. Did not be- 



come para- 

 sitized. 



44 



Strain B. 



Acute entamoebic 



dysentery. 



Strain C. 

 Liver abscess. 



Strain D. 

 "Contact carrier. 



34 



35 



37 



38 



39 



Did not be- 







Dysen- 



come para- 







tery. 



sitized. 









The incubation periods of these cases of experimental dysen- 

 tery were twenty, ninety-five, eighty-seven, and fifty-seven days, 

 respectively, with an average of 64.8 days. It is possible that 

 the incubation period might in certain cases be shorter than 



119781- 



