150 SWINE DISEASES 



ficial layers of the epidermis. In long-continued cases 

 the skin becomes thickened, due to the formation of 

 fibrous tissues. Swine affected with dermatitis do not 

 thrive, and they evidence a harsh skin and bristly coat. 

 Treatment. The treatment of these cases is simple, 

 as about all that is required is to shield the animals from 

 the direct light of the sun. Should the inflammatory 

 process be well marked, cooling antiseptic solutions may 

 be applied. 



Freezing 



Pigs farrowed in midwinter in the northern portion 

 of the temperate zone, where not properly housed, are 

 frequently frozen. The ears and tail are most affected 

 because of the large surface exposure and distal location 

 where the circulation is diminished. In some instances 

 the tissues are destroyed by the low temperature, and 

 slough, while in other cases the ears or tail, or both, are 

 frosted only and an inflammatory reaction is established 

 resulting in an engorgement and tumefaction of the 

 part. Later the skin desquamates and the parts are 

 tender when palpated. 



Transportation of market hogs in open stock cars 

 during very cold weather is responsible for the freezing 

 of the surface skin. The skin sometimes evidences 

 the lesions in strips corresponding to the openings between 

 the boards on the car. The lesions are similar to those 

 described in small pigs. 



Treatment. This consists of protection against 

 furthur freezing and the local application of protectant 

 dressings, as in ordinary wounds. 



Hemorrhage 



Cutaneous hemorrhage in which the extravasate is 

 retained in the skin is relatively common but is practically 

 always associated with specific infective diseases, seldom 

 occurring as simple cutaneous hemorrhage. 



