1 62 



Tuberculin Test in Canada. [June, 



character. Observations in this direction are still being carried 

 out. 



The Commission state that they have very carefully compared 

 the disease thus set up in the bovine animal by material of 

 human origin with that set up in the bovine animal by material 

 of bovine origin, and, so far, they have found the one, both in 

 its broad general features and in its finer histological details, to 

 be identical with the other. They have so far failed to discover 

 any character by which they could distinguish the one from the 

 other ; and their records contain accounts of the post-mortem 

 examinations of bovine animals infected with tuberculous 

 material of human origin, which might be used as typical 

 descriptions of ordinary bovine tuberculosis. 



The result thus arrived at, namely, that tubercle of human 

 origin can give rise in the bovine animal to tuberculosis identical 

 with ordinary bovine tuberculosis, seems, the Commission 

 observe, to show quite clearly that it would be most unwise to 

 frame or modify legislative measures in accordance with the 

 view that human and bovine tubercle bacilli are specifically 

 different from each other, and that the disease caused by the one 

 is a wholly different thing from the disease caused by the other. 



[Interim Report. Cd. 2092. Price id.] 



The system adopted by the Canadian Government by which 



stock exported from this country to Canada was tested by the 



tuberculin test by an officer of the Canadian 



Tuberculin Test Department of Agriculture stationed at Glas- 

 in Canada. %■ * .. . 



gow,'" has now been discontinued, and the 



catjtle quarantine regulations provide that cattle six months old 

 or over imported from countries other than the United States or 

 Mexico shall not be discharged from quarantine in Canada until 

 they have been submitted to the tuberculin test by a duly 

 authorised officer. Cattle reacting to the tuberculin test, but 

 not showing clinical symptoms, shall be permanently marked in 

 the right ear with the letter " T," and may then be released at 



* Journa', Vol. VIII., June, 1901, p. 99; Vol. IX., June, 1902, p. 109 ; Vol. X., 

 September, 1903, p. 261. 



