THE SKIN 243 



With digestive derangement, but may be caused by filth and the irri- 

 tation caused by lice. 



Lesions and Symptoms. — The typical lesions are red, circumscribed 

 blotches that are hot and pruritic. Because of the pruritis the pig 

 rubs the skin and may produce abrasions from which serum and 

 blood may escape. The disease usually terminates in recovery on the 

 second or third day, although in severe cases pustular formation may 

 follow. 



Treatment. — Clean the swine and premises, and administer a saline 

 purgative, such as Epsom salt. 



IMPETIGO (measles) 



Impetigo is a condition in which there is an eruption of papules or 

 pustules. The pustules may rupture soon after eruption or become 



Hog affected with urticaria. (Ostertag.) 



desiccated, forming a crust or scab. This condition is commonly 

 erroneously called measles. 



This condition is relatively common in pigs in some sections of the 

 United States, particularly in the southern states. It has been ob- 

 served in range swine as well as in swine that have been kept in small 

 feed lots. An individual case may be observed but it more commonly 

 assumes the form of an infection and from 5 to 8Q per cent of the 

 pigs on a farm or range will become affected. The disease is rarely 

 fatal but is of economic importance because the animals that are 

 affected do not develop properly and persist as small dwarfs or runts 

 regardless of the fact that they may be given an abundance of the 

 best quality of feed. 



Etiology. — The specific cause of this condition has not been deter- 

 mined. Various pyogenic micrococci have been isolated from the 

 local lesions, but these micro-organisms may be found upon the skin 

 of normal swine and they may therefore be considered of secondary 



