UDDER-TUBERCULOSIS 101 



One or more quarters are involved and of these at least 

 one of the posterior quarters. The affected quarters are 

 enlarged, especially in the inferior parts. Usually the en- 

 largement is uniform, seldom irregular, in which latter cases 

 nodular foci are present. The enlarged portion is hard and 

 painless. These portions may infrequently present a 

 wound which is chronic and contains a stinking, soft, 

 caseous, purulent secretion. 



The lymph-gland of the affected quarter is correspond- 

 ingly increased in size. Only in one case was the lymph- 

 gland not visibly enlarged. 



The quantity of milk is at first slightly but later greatly 

 diminished. The milk is of normal appearance in low- 

 grade alterations of the udder, but gradually changes with 

 the progression of the disease. It becomes yellow and 

 mixed with pus and finally yellowish-gray and purulent. 

 Usually, however, it is thin and contains a few free flocculi 

 of fibrin. 



This alteration of the milk can occur rather quickly. 

 After one month the milk can become distinctly changed. 

 Usually, however, this does not occur until after two 

 months. There are cases, however, in which the milk had 

 retained its normal appearance until four months after the 

 inception of the condition. These differences naturally 

 depend upon the degree of distribution and the rapidity 

 of development of the tuberculous lesions. 



In the rather infrequent complications with secondary 

 infections or saprophytic invasion the milk can become 

 grayish-red, especially in the more acute secondary infec- 

 tions, and stinking in gangrene. 



Upon microscopical examination of the sediment one 

 usually finds a moderate number of acid-fast tubercle bacilli 

 outside of the cells. 



With a moderate number of tubercle bacilli I believe 

 that one may find from one to ten bacilli in every field when 



