Bacteria and Health 89 



composition. The fact is thus emphasized that the 

 animal excreta which find their way into ponds may 

 become a bacteriological factor of importance from the 

 standpoint of the health of the animals. 



Intestinal disturbances among young animals, as- 

 suming, at times, the proportions of an epidemic, may 

 undoubtedly have their origin in the polluted water 

 of ponds and brooks. 



