BY C. .J. POUND, F.K.M.S. 



47 



If there is any rise less than this, a repetition of the 

 injection after three or four weeks is desirable. 



As a rule, with tubercular animals the temperature in a 

 typical case will begin rising 12 houi's after injection — i.r., at 

 6 a.m., and by noon may reach 107 degrees Fahr. 



One point worth remembering is that, generally speaking,. 

 the smaller and fewer the lesions of tuberculosis, the greater 

 and more certain is the reaction produced, while on the other- 

 hand cattle suftering from advanced tuberculosis will give only 

 a slight reaction ; in fact, it is very often observed that in the 

 very latest stages of the disease the animal may show no 

 reaction whatever. This is explained by the fact that the 

 animal, in consequence of the generalised form of the disease, 

 is so literally saturated with tuberculous products, that the 

 very small amount of tuberculin injected fails to excite the 

 tissues. It is also worthy of mention that as such advanced 

 cases do not require tuberculin injection to discover their 

 diseased condition, this source of failure does not count against 

 the value of the test. 



Table showing Temperatures Before and After Injection of 

 Tuberculin of a Healthy and a Tuberculous Animal. 



Had till/. 



AFTER INJECTION. 



100(> 



101-2i 



101-4 



101 



102-1 



AFTER INJECTION. 



103-1 



lOo-S 



106-9 



106-1 



6 p.m 104-8. 



"' injection took place at 6 p.m. 

 I TAvelve hours after injection. 



