, INFECTIOUS DISEASES I23 



As in all serious febrile disturbances, the secre- 

 tion from the lining membrane of the eyelids is 

 increased. At first the secretion is watery, but 

 soon becomes heavy and pus-like.^ It accumulates 

 on the margins of the lids, causing them to adhere 

 together. There is also an increase in the skin 

 secretions. These become mixed with the dirt and 

 dust, which adheres to the surface of the skin and 

 gives the animal a dirty appearance. Red, hem- 

 orrhagic spots or blotches may appear on the skin 

 in the region of the ears, on the under side of the 

 neck and abdomen, and other parts of the body, 

 but unless the skin is light colored, this syrnptom 

 is not very prominent. Siipilar spots may be seen 

 on the lips and the lining membrane of the mouth. 



Early in the attack constipation occurs and later 

 a diarrhoea, or a diarrhoea and constipation may 

 alternate. The diarrhoeal discharge is thin and 

 watery, has a foetid odor, and is usually dark col- 

 ored or black. Sometimes it is mixed with blood. 

 However, the color of the feces depends somewhat 

 on the kind of feed the animal has eaten, and if fed 

 mostly on corn, the evacuations are light colored. 



The respiration and pulse beats are quickened. 

 Thumps sometimes occur. When the throat is 

 swollen and inflamed, the respirations are labored 

 and noisy. The symptoms advance rapidly. The 

 hog becomes very weak and depressed in the lat- 

 ter stages of the disease, and is usually found dead 

 in its bed. The duration of the acute form is 

 from two days to two weeks. In some cases death 



