426 THE BACTERIOPHAGE AND ITS BEHAVIOR 



4. THE BACTERIOPHAGE IN THE HORSE 



Sixty-two specimens of manure derived from horses living both in 

 cities and in the country, in France and in Indo-China, have been ex- 

 amined and all contained an active bacteriophage. A list of the animals 

 is given, and the results of the examination are recorded in table 56. 



The following notes, descriptive of the animals examined, show 

 somewhat the diverse conditions under which these animals lived. 



No. 1. Horse No. 21 of the Pasteur Institute. This horse was used 

 in the production of anti-dysentery serum. The examination was made 

 three days after the injection of Shiga toxin. 



No. 2. Horse No. 21 (above), tested ten days later. 



No. 3. Horse No. 21 (above), tested four months later, the examina- 

 tion being made 48 hours after a toxin injection. 



No. 4. Horse No. 114. Used in the production of Shiga anti- 

 dysentery serum. 



No. 5. Horse No. 18. Used in the production of Shiga anti-dysentery 

 serum. 



No. 6. Horse No. 18 (above), tested four months later. The speci- 

 men was collected 48 hours after the injection of Shiga toxin. 



No. 7. Horse No. 64. This horse had received injections of atoxic 

 dysentery bacilli — Flexner and Hiss — ^for two years. 



No. 8. Horse No. 65. This horse had received injections of atoxic 

 dysentery bacilli — Flexner and Hiss — for two years. 



No. 9. Horse No. 68. This horse had received injections of atoxic 

 dysentery bacilli — Flexner and Hiss — for two years. 



This horse was receiving injections of B. anthracis. 



This horse was receiving injections of B. anthracis. 



A carriage horse in Paris. 



A carriage horse in Paris. 



A carriage horse in Paris. 



The same animal as No. 14 (above) but tested four days 



A farm horse on a farm where avian typhosis was present. 



A farm horse on a farm where avian typhosis was present. 



A farm horse on a farm where avian typhosis was present. 



A race horse at Chantilly. 



A race horse at Chantilly. 



The same animal as No. 19 (above) but tested eight days 



