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THE BACTERIOPHAGE AND ITS BEHAVIOR 



Germaine Mel entered the Hospital on the 18th of July. 



From the first stool passed after her arrival a bacillus presenting the 

 biochemical characteristics of the Shiga bacillus was isolated after 

 considerable difficulty. It was inagglutinable, and it was only after 

 three transfers on agar that agglutination was secured (1 :500). 



Chart. 1. 



Virulence for 



Germaine Mel Dysentery (Shiga) 



B. dysenteriae from the patient 



B. dysenteriae, stock strain 



B. coli 



As can be seen from the tracings, the number of fluid stools, seventeen 

 on the first day, fell quickly during the second day to two, without 

 medication. 



The intestinal bacteriophage, isolated from the fifth stool of the first 

 day, was endowed with an extreme virulence for the bacillus causing 



