GENERAL DISEASES 3 



quarters will raise it, while cold quarters and drink- 

 ing cold water has the opposite effect. 



In disease there may be from one to four degrees 

 of fever. In some disorders the body temperature is 

 below the normal. 



The visible mucous membranes are those lining the 

 mouth, nose, and eyelids. They may become changed 

 in appearance in acute and chronic forms of disease. 



In health the visible mucous membranes are a. pale 

 reddish color and appear moist. Their color, how- 

 ever, will vary, and may become a deep red during 

 .exercise. The following changes may be noted in 

 disease: when inflamed and in feverish conditions, a 

 bright red; in collapse, internal hemorrhage, and im- 

 poverished or bloodless conditions of the body, pale; 

 in the beginning of a fever, dry, but in later stages, 

 excessively moist. The mucous membrane lining the 

 mouth may become coated and soapy, like in digest- 

 ive diseases. In hog cholera and other serious febrile 

 diseases, secretions may accumulate around the marr 

 gins of the eyelids and the eyes appear dull. 



The skin of a healthy hog feels mellow and soft, 

 and the coat appears heavy, smooth, and glossy. How- 

 ever, the skin and coat of a healthy animal are subject 

 to a great deal of variation because of the surround- 

 ings and care. When the coat is thin, irritation from 

 the sun and dirt may greatly change the appearance 

 of the skin. An inelastic, hard, rigid, scurvy skin, 

 and a dry, thin, rough, harsh coat indicate an un- 

 thrifty, unhealthy condition. 



The character of the body excretions and secre- 



