SYMPTOMS AND LESIONS 53 



a primary or secondary influence. There is a 

 tendency by no means constant, and of little diag- 

 nostic significance, for larger and less well defined 

 hemorrhages to appear under the influence of 

 Bact. suisepticum. There is also some evidence, 

 as yet poorly substantiated, that very exception- 

 ally Bact. necrophorus produces petechiae in the 

 kidneys of hogs. This should be regarded as a 

 remote possibility occurring only in association 

 with extensive necrotic lesions in other organs. 



Bladder. Sometimes normal. Mucosa slightly 

 congested, due to hog cholera virus or other 

 causes. Mucosa dotted with petechiae, due usu- 

 ally to hog cholera virus. 



Sheath. Often normal. Sometimes distended 

 with foul smelling, discolored urine. Catarrhal 

 inflammation of mucosa. Condition not charac- 

 teristic of hog cholera. Found in other diseases, 

 especially those resembling rheumatism. 



Lymph glands. Sometimes normal. Typical 

 filterable virus lesion consists of congestion or 

 hemorrhage which appears first in the cortex of 

 the gland, and which may later involve the entire 

 structure giving it a uniform dark color on section. 

 Petechiae are rarely present. Edema frequently 

 pronounced. Permanent enlargement and casea- 

 tion occur in chronic hog cholera. Rare for all 

 glands to show macroscopic changes. Glands 



