URO-GENITAL SYSTEM 183 



flammation. Thus pneumonia, hog cholera, swine plague, and septic 

 infections are usually accompanied by nephritis. Some serum pro- 

 ducers have had losses of hyperimmune swine due to contaminated 

 virus. In the swine that died in these cases not only the lesions evi- 

 dencing general septic infection were present but also marked lesions 

 of an acute parenchymatous nephritis. Turpentine, phenol, and the 

 various coal-tar products are capable of producing nephritis. Cor- 



A B 



Fig. 38. KIDNEYS. A, normal; B, hog cholera (turkey egg) kidney. 



rosive sublimate, too, may be obtained in sufficient quantities to pro- 

 duce the disease. 



Lesions. — The lesions of acute parenchymatous nephritis are prac- 

 tically confined to the epithelium of the glomeruli and convoluted 

 uriniferous tubules. The affected kidney is slightly enlarged and has 

 a parboiled appearance. The capsule is easily removed, the kidney 

 substance is usually soft, and blood escapes freely from a cut sur- 

 face, Microscopically the affected epithelium is affected with hy- 



