430 THE BACTERIOPHAGE AND ITS BEHAVIOR 



Nos. 5 and 6 represent chickens which had recovered from avian 

 typhosis (4 tests made). 



Nos. 7 and 8 represent chickens which died of avian typhosis (8 other 

 tests gave similar results). The bacteriophage was present but was not 

 virulent for the pathogenic bacillus. 



Nos. 9 and 10 were chickens hving 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 essen- 

 tially the same) . 



Nos. 13 and 14 were chickens in France hving in regions where avian 

 typhosis was present.* 



6. THE BACTERIOPHAGE AS FOUND IN A NUMBER OF DIFFERENT SPECIES 



Throughout the course of the many experiments performed there has 

 been an opportunity to study the nature of the intestinal bacteriophage 

 as found in a considerable number of different animal species. That 

 such a bacteriophage is to be found within the intestinal tract becomes 

 obvious when we consider the very diverse species in which it has al- 

 ready been disclosed. The results obtained in examining the excreta of 

 some of these animals are presented in table 58. Explanation of the 

 numbers appearing in the first column follows. 



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. 



Nos. 6 and 7. Cattle in France, in a region free of epizootic diseases. 



Nos. 8 and 9. Steers in Cochin-China, Hving in regions free of 

 epizootics (42 other comparable tests) . 



Nos. 10 and 11. Buffaloes living in regions free of barbone (14 other 

 comparable tests). 



Nos. 12 and 13. Healthy buffaloes living in regions where barbone 

 was present (24 other comparable tests). 



Nos. 14 and 15. (for comparison) Buffaloes sick (14) or dead (15) 



* I would recommend that bacteriologists desiring to procure strains of the 

 bacteriophage investigate principally the excreta of horses and chickens, partic- 

 ularly at the beginning of their work. It is from these animals that 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. 



