310 



BULLETIN No. 161 

 TABI.E 7. Continued 



[November, 



temperature sufficient to pasteurize; most likely the organisms were killed by 

 heating. 



EXPERIMENTAL WORK 



The main purpose of this work was to determine 

 INTRODUCTION t h e length of time that bovine tubercle bacilli live 



outside the animal body where they may be scat- 

 tered by tuberculous farm animals, especially dairy cattle. As it was 

 not feasible to keep tuberculous cattle at the Station, only a part of 

 the work originally planned with naturally infected feces was done. 

 In connection with this investigation some work has been done on 

 tubercle bacilli of the human type and on other pathogenic and 

 non-pathogenic organisms for purposes of comparison. 



