182 SWINE DISEASES 



dent, the discolored areas being observed on the venter 

 surface inside the thighs, and are red or reddish purple in 

 color. The ears become tumefied due to congestion and 

 edema. There is a rise of temperature, the high tem- 

 perature ranging from 105 to 107 degrees Fahrenheit, or 

 even higher, persisting throughout the acute attack. 

 The affected animals become weak as the disease pro- 

 gresses, and it usually terminates fatally in from two to 

 seven days. In some instances the first manifestation of 

 the disease consists of rheumatoid symptoms, the disease 

 sometimes being diagnosed as rheumatism. 



Intestinal form. The intestinal form of hog cholera 

 is manifested by symptoms similar to those described in 

 the septicemic form but less intense. This form of the 

 disease is less acute and runs a longer course. Symptoms 

 of digestive derangements are the principal evidence of 

 the disease and consist of impaired appetite, inappetence, 

 vomition, constipation alternated with diarrhea, weak- 

 ness, and rapid emaciation. Purulent conjunctivitis is 

 usually present. A bad odor emanates from the mouth 

 and on inspection putrefying accumulated inflammatory 

 exudate is observed adhering to the buccal mucous mem- 

 brane. The tonsils and pharyngeal mucous membrane 

 may be hyperemic and hemorrhagic. Erythema of the 

 ventral surface may exist, the ears become tumefied, and 

 occasionally necrosis succeeded by sloughing occurs. 

 Areas of skin on the back or croup may become necrotic 

 and slough, leaving large, deep, ugly wounds. 



The course of the disease varies from two to four 

 weeks, the majority of the affected animals succumbing, 

 but occasionally one or more recover after a long period 

 of convalescence in which the diarrhea is gradually over- 

 come. There is desire for food, and ultimately there is 

 a normal appetite and the animal gradually becomes 

 stronger and finally recovers. 



Pectoral form. The symptoms of the pectoral form 

 of hog cholera consist of the symptoms of the septicemic 

 form of cholera and of pneumonia. The symptoms of the 

 septicemic type are usually evident when the pneumonia 



