Contagious and EpisDotic Diseases. 



Then swelling, lieat and tenderness supervene commonly 

 in a heel, and firm nodules form, increasmg to one-third 

 or one-half an inch in diameter, the hair bristles up, and 

 the skin reddens unless previously colored. On the ninth 

 to the twelfth day, a limpid fluid oozes from the surface 

 and agglutinates the hairs in yellowish scabs, on the re- 

 moval of which a red, raw depression is seen with the 

 scab fixed in its centre. In three or four days the secre- 

 tion ceases, the scabs dry up and the parts heal sponta- 

 neously. It is easily transmitted from horse to horse, to 

 man or to the cow. No treatment is required. 



COW-POX. 



This is the same disease appearing in the cow. There 

 is a prehminary slight fever, usually overlooked, succeeded 

 by some diminution and increased coagulability of the 

 milk and the appearance of the pox on the udder and 

 teats. The-udder is hot and tender for a day or two, then 

 little pale-red nodules, about as big as peas appear, 

 growing to three-fourths to one iach in breadth by the 

 eighth "or tenth day, acquiring liquid contents, and often 

 a central depression on the summit. The Hquid ia each 

 pock is contained in several distinct sacs and cannot be 

 aU extracted without a succession of pimctures on differ- 

 ent parts. The hquid, at first clear, changes to yellowish 

 white (pus) and soon dries up, the whole formiag a hard 

 crust which is gradually detached. On the teats the bhs- 

 ters are early ruptured and raw sores form, often proving 

 very obstinate, and even leading to inflammation of the 

 udder, abortion, or death. 



Treatment is scarcely ever demanded further than to 

 obviate sores on the teats. A mild laxative of Epsom 

 salts is, however, usually desirable. The teats may be 

 smeared with an ointment formed of an ounce each of 

 spermaceti and almond oil and half a drachm of myrrh. 

 MUMng tubes may be necessary to avoid injury by draw- 

 ing the teats. 



