50 HOG CHOLEKA 



orrhages beneath capsule are normal. These are 

 frequently on ventral surface near the hilus, not 

 so often along the borders and on the dorsal sur- 

 face. Characteristic filterable virus lesions con- 

 sist of black, well defined slightly raised hemor- 

 rhages % to 2 centimeters in diameter, located 

 practically always somewhere on the margin. 

 Spleen may be enlarged, dark, friable, engorged 

 with blood. Due usually to secondary invasion 

 with B. suipestifer, sometimes to other causes. 

 Not of much diagnostic value as related to hog 

 cholera. 



Liver. Macroscopic appearance usually nor- 

 mal. Very exceptionally ecchymoses, seemingly 

 due to hog cholera virus, are visible beneath the 

 capsule. Often shows degenerative changes, 

 probably due to hog cholera virus, but by no means 

 characteristic, as they may be due to a variety of 

 causes. 



Kidney. Very rarely normal. Seat of the 

 most characteristic and constant hog cholera le- 

 sions, consisting of petechiae. Organ may be 

 changed as follows: 



Normal in color, capsule peels easily. Surface 

 of kidney studded with petechiae which appear 

 beneath the capsule, involving the glomeruli as 

 well as other parts. On section, the petechiae are 

 seen variously distributed in the cortex, in the 

 medulla, and sometimes in the membrane of the 



