GENERAL PART OF EXAMINATION. 



55 



IV. 



Acute E X a n t li e m a s 



1. Foot and mouth disease [said not to occur in the United 

 States], is an acute infectious disease of cloven-hoofed animals, 

 characterized by the appearance of vesicles upon the mucous 

 membrane of the mouth, the skin of the coronet, and in the inter- 

 digital space. Period of incubation 1 to 3 days. The disease is 

 attended by moderate fever, salivation, diminished appetite, lame- 

 ness, recumbent position. The vesicles rupture, leaving erosions 



Fig. 15.— Urticaria. 



on the mucous membranes, and dry scabs on the skin. Complica- 

 tions are not infrequent. 



2. Sheep pox is a contagious exanthema running an acute 

 course and having a typical character. Incubation 4 to 7 days; 

 artificial inoculation shorter. On the haired portions of the body, 

 around the eyes, nose, mouth, inner surfaces of the legs, appear 

 punctiform reddenings (pimples), later papules. In about six days 



