140 PRINCIPLES OF VETERINARY SURGERY 



sions, although rather exti-avagent claims have been coming 

 "thick and fast" from every corner of the world. 



The problem of artificially immunizing cattle against 

 tuberculosis is now occupying the attention of some leading 

 veterinarians of the present day, but the methods recom- 

 mended are still in the experimental stage and can there- 

 fore neither be approved nor condemned. Judging from 

 the discussion on the subject at the meeting of the American 

 Veterinary Medical Association of 1905, it is very evident 

 that there are no convincing data to submit to the veterinary 



Fig. is. 

 Bacillus Tuberculosis from Sputum. 



student at the present time, and that the processes recom- 

 mended are tedious, uncertain and impractical. 



Certain vaccines consisting of attenuated tubercle bacilli 

 are actually dangerous in that they produce the disease in 

 its generalized form in at least a small percentage of the 

 vaccinated animals. The International Veterinary Congress 

 (1905) held at Budapest) by resolution advised in the fol- 

 lowing words that "until the field of usefulness of vaccina- 

 tion against tuberculosis is established, the continued em- 

 ployment of the sanitary measures known to be effectual is 

 essential." 



