DISEASES OF THE MAMMARY GLANDS. 135 



the diseased quarter. If not too sensitive, the udder 

 should be gently rubbed and kneaded to favor discharge 

 of diseased products from the acini. Diet should be 

 such as to diminish secretion of milk. In Cows, saline 

 purgatives, like Glauber's or Epsom salt, may be used. 

 Destroy, or render innocuous, infective material in the 

 udder, and combat inflammatory changes. Disinfect- 

 ants injected are useful, but cannot reach the fine milk 

 ducts and alveoli. Four per cent, boric acid (Nocard); 

 2 per cent, alum or 2.5 per cent, carbolic solution 

 (Franck) ; one-fifth to one-quarter per cent, sublimate 

 solution (Eggeling). Poultices, hot fomentations ; 

 infriction with bland oils, or ointment of mercury is 

 useful. As soon as the abscess appears superficial, it 

 should be opened and the cavity cleansed and disin- 

 fected. 



MASTITIS GANGRENOSA, OR GANGRENOUS INFLAMMATION 

 OF THE UDDER. 



This form Oi the disease is commonest in Sheep, 

 thouo-h it occurs in the Cow and Goat. The nature of 

 the specific poison is at present little understood. 



Symptoms. — The disease starts as a peracute paren- 

 chymatous mastitis. Severe general symptoms, high 

 fever, inappetence, great weakness, severe pain, and 

 stiff, straggling gait first direct attention to the udder. 

 Blueish-violet soft spots on the skin, which are insensi- 

 tive and often abnormally cool. These spots quickly 

 spread. They are surrounded by an inflammatory 

 swelling, which may extend to the lower part of the 

 -abdomen and the thigh. Back arched, hind legs strad- 



