276 



INFECTIOUS DISEASES 



The stomach and iniestines may show hemorrhag'ic spots and 

 blotches. Sometimes the gastric and intestinal nnicons mem- 

 brane is a brick red. Ulceration of the mucous membrane is 

 common (Fig. 83). 



Small, red spots may be present on the surface of the lungs 

 (Fig. 82). Scattered lung lobules or a large portion of the 

 lungs may be inflamed. In chronic hog-cholera^ pleural exuda- 



Fia. 83. — A piecL- ol intustine from a hog that died of chronic hog-cholera, showing appear- 

 ance of intestinal ulcers. 



tion, adhesions and abscesses in the lung tissue may occur. In- 

 flammations of the pericardimu and heart muscle are less common 

 lesions. 



Preventive Measures.— Hog-cholera is the most widespread 

 infectious disease of hogs, and all possible precautions against its 

 distribution to healthy herds should be practised. Hogs coming 

 from other herds and stock shows should be excluded from the 



