Epizoot'iG Catarrh, 401 



unhealthy, and thus incapable of performing the acts of 

 perspiration. Also in those where the perspiration has been 

 suddenly checked by exposure to showers, sudden changes of 

 temperature, the chill night air, etc. By these means an 

 excessive labor is forced on the inner membranes, and they 

 are weakened and predisj)Osed to disease. 



It has constantly been noticed that clean hogs, well 

 washed, well housed, and well fed, hardly ever succumb to 

 this disease, or, indeed, contract it at all. 



Symptoms, — As explained under this disease in sheep, the 

 symptoms vary with the part of the mucous membrane most 

 involved. This is even more noticeable in the hog. 



The first form is where the membrane which, commencino' 

 at the nostrils, continues to the windpipe and lungs, is the 

 main seat of disease. Here the earliest symj)toms are a 

 short, hoarse cough, hoarseness in the squeal, and a difficulty 

 of breathing, indicated by a panting motion of the flanks, 

 and by holding the head in a peculiar, stretched and some- 

 what drooping position. There is often some running from 

 the nose, a slow gait, tottering or stiff, and signs of fever. 

 Many make efforts to vomit ; generally there is constipation, 

 but at times diarrhea. 



The second form has a short cough, but less marked, and 

 there is less oppression in breathing. . There is more decided 

 w^eakness or j^alsy in the hind quarters, and the gait is more 

 tottering. But as here the power of the poison is spent on 

 the lining of the stomach and bowels, there is at first cos- 

 tiveness, followed by a profuse and fetid diarrhea. The pain 

 and soreness of the intestines are indicated by the animal 

 arching its back, especially the loin portion, often to a very 

 high degree. 



Together with these symptoms, there may be affection of 

 the brain, indicated by partial or entire blindness, a stagger- 

 ing gait and aimless movements ; or a sympathy of the 



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