144 SPECIAL CATTLE THERAPY 



eulous members, we wei'e not prepared for the most 

 shocking disclosures made by the tuberculin — namely : 

 that out of four hundred and fifty cows tested one 

 hundred and seventy-two gave a decidedly positive 

 i-i^action. 



Veterinarians long engaged in practice are never 

 surprised by results obtained with the use of tuber- 

 culin ; they have seen cows react under such a great 

 vai'iely of circumstances and conditions of environ- 

 ment that the.y always expect to find it. 



In this place we must confine our remarks, however, 

 to those clinical manifestations of tuberculosis which 

 the practicing veterinarian may encounter in the indi- 

 vidual cow in the daily rounds of practice ; those mani- 

 festations which must attract his attention to the tuber- 

 cular character, or nature, of more or less usual patho"- 

 logical states. 



We are but little concerned with the tuberculin- 

 testing of cows in herds, because, when we once arrive 

 at the tuberculin application, we are expecting to find 

 tuberculosis. Our task, in this treatise, is to attempt 

 a discussion of those marks which should demonstrate 

 the necessity of the tuberculin test in cases where we 

 do not ex peel to find it. And it is indeed a task to 

 make the discussion both intelligent and brief. 



To begin with, the veterinarian whose practice 

 brings him in daily contact with herds of dairy cattle 

 or, to express it more specifically, with the individuals 

 of those herds, must be constantly on the lookout for 

 manifestations of tuberculosis. If he relaxes his guard 

 in this -respect in any ease, no matter what the path- 

 ology of the case under his care at the time, he is in 

 serious danger of jeopardizing the finaneial interests of 

 his client and the social welfare of humanity at large. 



The veterinarian's examination, especially in sub- 



