LESIONS IN THE SKIN 



127 



with the formation of permanent discolorations. If these hemor- 

 rhagic spots are very small and pin-point in appearance they are 

 classed as petechial hemorrhages. The large red blotches com- 

 monly seen in severe cases are known as ecchymotic hemorrhages. 



^ * .J 



Fig. 4o. — Si'vcrc congostioii anil In iiinnli mi - b. n. 

 (H. K. Mullord Co ). 



t ho bkin in hog cholera 



Distinction can be made between the redness due to simple 

 dilatation of the blood-vessels (or hyperemia, as it is pathologically 

 known) and that due to hemorrhage by simply pressing upon the 

 reddened areas. If the reddening is due to hyperemia the blood 



