178 



THE BACTERIOPHAGE 



of the infection, and with a somewhat lower grade of virulence 

 for the stock Shiga strain and for B. coli. 



The stools of eleven of the inmates of this institution were 

 examined. Among the number were nine who had shown in- 

 testinal disturbances two or three days previously. Two had 

 shown no morbid symptoms. All of those examined contained 

 a bacteriophage with a high or extreme virulence for the Shiga 

 strain isolated from the stool of Germaine Mel. ... as well as 

 for the stock strain of Shiga and for B. coli. 



Day of the Disease 



FIG. 2. MARIE LEB (26 years) DYSENTERY (SHIGA) 



!B. dys enter iae from the patient 

 B. dysenteriae, stock strain - 

 B. coli 



-Stools contained blood 



Therefore, with Germaine Mel. . . . there was a bacteriophage 

 of maximum activity, even from the beginning of the disease. 

 Recovery took place within twenty-four hours. 



2. Marie Leb (twenty-six years, fig. 2). This case was 



one with a mild dysentery, due to B. dysenteriae Shiga. The 

 stools were typical, containing blood and mucus. Entrance 

 to the Hospital took place on the eighth day of the disease. 

 The first stool containing blood had been passed the day before. 



Upon entrance to the Hospital the feces contained a bacterio- 



