INFECTIOUS DISEASES 177 



or septicemic form, intestinal form, pectoral form, and 

 mixed form. The first-named is uncomplicated hog 

 cholera; the other forms are due to complications. 



Septicemic form. In the very acute cases no gross 

 lesions are evident except cloudy swelling of the paren- 

 chymatous organs indicating a high antemortem tem- 

 perature. In the ordinary acute cases the lesions corre- 

 spond to those of septicemia and consist of hemorrhages 



Fig. 11. MUCOUS MEMBRANE OF THE BLADDER. 

 A. Normal. B. showing: inflammation due to hog: cholera. 



in the serous membranes, in the mucous membrane of the 

 epiglottis, trachea, lung, pharynx, and usually in the 

 spleen and kidneys. The lymph glands are hyperemic 

 and the lung usually contains small areas of croupous 

 pneumonia in the cardiac lobe. The skin may be hy- 

 peremic, and there may be subcutaneous hemorrhages. 

 The bone marrow is usually dark red or black. 



Intestinal form. This type is apparently a complica- 

 tion due to the simultaneous activity of the filterable 

 virus and the Bacillus suipestifer, Bacillus necrophorous, 



