Symptoms. 275 



pharyngitis, associated with difficulty in swallowing, frequently 

 also by difficult, rattling respiration, and death may result from 

 asphyxiation. 



In the less severe form these symptoms continue to exist, 

 and in some cases several small or larger growths may after 

 a time be felt in the abdominal cavity by palpating the relaxed 

 abdominal wall (lymph glands and adherent intestinal loops). 



In severe cases the animals, having lost their appetite, be- 

 come more and more emaciated, the diarrhea alternates with 

 constipation (this is sometimes also observed in extensive ulcera- 

 tions of the intestines), they become very weak and anemic, 

 move only with difficulty and with a staggering gait, or they 

 stand in one place with back arched,, and with croup sunken 

 (Fig. 52) . Towards the end they continuously lie on the ground, 

 and die completely exhausted, at the earliest on the 11th day 

 after the infection, mostly however in from 2 to 3 weeks. 



In other cases the acute symptoms of an intestinal affection 

 diminish in 1 to 3 weeks, the appetite gradually improves, the 

 diarrhea ceases, the animal moves about more lively, and finally 

 a complete recovery takes place. Sometimes the animals con- 

 tinue to be sickly, in spite of the fact that the acute symptoms 

 become milder. The appetite remains irregular, normal move- 

 ment of the bowels alternates with diarrhea, the animals do not 

 show a normal development, gradually a severe anemia and 

 cachexia sets in, which finally leads after some months to com- 

 plete exhaustion. 



3. Pectoral Form. With the initial symptoms of pure hog 

 cholera manifestations of an acute pneumonia or pleuro-pneu- 

 monia become associated after several days and from this stage 

 on the clinical development is identical with the acute or chronic 

 swine plague (see p. 132). 



4. Mixed Form. In this form symptoms of varying inten- 

 sity develop in connection with the symptoms of hog cholera 

 infection, which indicate gastro-intestinal trouble, as well as 

 an affection of the thoracic organs. Besides inappetence and 

 diarrhea there is a cough, and increasing difficulty in respira- 

 tion, and in unfavorable cases death results as a rule directly 

 from the affection of the thoracic organs. In the later course 

 the symptom-complex of both forms may exist for a long time, 

 and they are not infrequently observed simultaneously even in 

 the chronic cases ; while occasionally the manifestations of the 

 lung affection are less pronounced in the early stages, they later 

 become milder, and the dominating symptoms then consisl of 

 a changeable or depraved appetite and diarrhea. 



The cases belonging to this form manifest with relative 

 frequency changes in the skin. Aside from the extensive necro- 

 sis which is sometimes present, resulting from the action of the 

 hog cholera bacillus, and being principally observed on the ears. 



