INFECTIOUS DISEASES I39 



while in hog cholera it is based largely on the 

 intestinal symptoms. 



In the acute form, the hog is depressed, dull and 

 feverish. The body temperature is very high (io6° 

 to 109°). The skin appears flushed, the animal is 

 weak and 'Staggers when it walks, and the breathing 

 is heavy. The hog is usually seen lying down, may 

 be unaible to get on its feet, and acts stupid and 

 sleepy. This sleepy, comatose condition may end in 

 death, or death occurs in a convulsion. The course 

 of the disease is from one day to a week. 



The chronic form shows a more characteristic train 

 of symptoms. At the beginning the hog may be- 

 have the same as in the acute form. Usually the 

 symptoms are not nearly as severe. The appetite 

 is impaired, the body temperature elevated, the 

 back arched, abdomen tucked up and the flanks 

 hollow. The animal behaves in a dull, stupid 

 manner and shows symptoms of a serious respi- 

 ratory disease, such as labored, difficult breathing 

 and coughing. If the sides of the chest are 

 pressed on, it causes the animal severe pain. 

 Friction sounds may be heard on placing the ear 

 against the chest walls. 



The bowels usually become constipated and the 

 hog loses flesh very rapidly, and finally becomes 

 so weak that it is unable to get on its feet and 

 walk. In the latter stages it may be seen lying 

 on its side in a stupor, and when moved will 

 squeal and show other symptoms of pain. The 



