DISEASES OF THE MAMMARY GLANDS. 133 
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 o. the disease is commonest in Sheep, 
though 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- 
