THE BACTERIOPHAGE IN THE HEALTHY INDIVIDUAL 233 



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 examined and all contained an active bacteriophage. 

 A list of the animals is given, and the results of the examination 

 are recorded in table 4. 



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

 was used in the production of anti-dysentery serum. The ex- 

 amination was made three days after the injection of Shiga toxin. 



July 15. 

 July 16. 

 July 17. 

 July 18. 

 July 19. 

 July 20. 

 July 21. 

 July 22. 

 July 23. 

 July 24. 

 July 25. 

 July 26. 

 July 27. 

 July 28. 

 July 29. 

 July 30. 



C = B. coli; H = B. dysenteriae Hiss; Sh. = B. dysenteriae Shiga; 

 B = B. paratyphosus B. 



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



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

 examination 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 specimen was collected 48 hours after the injection of Shiga 

 toxin. 



