180 



THE BACTERIOPHAGE 



Day of the Disease 



Se 



23 



Fig. 4. Jean Ker (6 years) Dysentery (Shiga) 



B. dysenteriae from the patient - 



Virulence for -j B. dysenteriae, stock strain 



B. coli 



: Stools contained blood 



4. Jean Ker. . . . (six years, fig. 4). This patient was a 

 brother of the foregoing. The general condition was poor when 

 admitted to the Hospital on the third day of the disease. There 

 were from twenty to thirty bloody stools a day; a severe dysen- 

 tery due to the Shiga bacillus. On the fourth day of the disease 

 there were twenty-four bloody stools. The bacteriophage was 

 feebly active (+) for B. coli and was inactive for the Shiga 

 bacillus. The record shows the following: 



