THE BACTERIOPHAGE IN THE HEALTHY INDIVIDUAL 237 



Nos. 9 and 10 were chickens living in Cochin-China in regions 

 free of both avian typhosis and barbone. 



Nos. 11 and 12 represent chickens living in Cochin-China in 

 areas where barbone was present but free of avian typhosis (11 

 tests, all essentially the same). 



Nos. 13 and 14 were chickens in France living in regions where 

 avian typhosis was present. 2 



THE BACTERIOPHAGE IN DIVERSE ANIMALS 



Examinations have been made of the excreta of the following 

 animals (table 6). 



No. 1. A monkey, confined in a cage in Paris. 



Nos. 2 and 3. Cats in Paris. 



Nos. 4 and 5. Cattle living on a farm where avian typhosis 

 was present. 



2 1 would recommend that bacteriologists desiring to procure strains of 

 the bacteriophage investigate principally the excreta of horses and 

 chickens, particularly at the beginning of their work. It is from these 

 animals that it is most easy to isolate strains of the bacteriophage having 

 a high activity when taken from the body. These excreta are, moreover, 

 more readily procured than the feces of convalescents. 



