TUBERCULOSIS 149 



fore they are much enlarged. The great swelling, 

 tenseness and soreness which we find in the udder in 

 other forms of mastitis is lacking here; the udder is 

 the seat of some swelling, but not much. This swell- 

 ing is somewhat ''doughy" in consistency and not 

 very painful. The body temperature is elevated but 

 little or not at all. We have met with cases of acute 

 tuberculous mastitis of this type in unbred heifers. 



Chronic tuberculous lesions in the mammary glands 

 appear in various forms. Very commonly seen is the 

 form consisting of a solid mass of tissue in the glandu- 

 lar substance. To the touch this mass has the feeling 

 of smooth, fibrous tissue firmly compact and sharply 

 outlined. 



In other forms numerous small masses, of hazel- 

 nut size, can be felt in various parts of the gland. In 

 all cases there is enlargement of the regional lym- 

 phatic glands. Abscess formation of tuberculous origin 

 is not uncommon in the substance of the mammary 

 glands. When such abscesses rupture into the lacteal 

 cistern, which is not an unusual occurrence by any 

 means, there can be no question of the infectiousness 

 of the milk. 



Tuberculous meningitis occurs in cows but is prac- 

 tically never seen until the patient is in extremis as 

 the result of generalized tuberculosis. 



Habitual or recurrent tympanites is subject to the 

 suspicion of being tuberculosis. A herd cow who par- 

 takes of the same rations as the other members of the 

 herd and has repeated attacks of tympanites with no 

 particular cause, is a good subject for tuberculiniza- 

 tion. 



Bovine nymphomaniacs always deserve the tuber- 

 culin test, before any other form of treatment is in- 

 stituted. 



