270 



Hog Cholera. 



Anatomical Changes. According to the presence and the 

 nature of the secondary infection, the following forms of the 

 disease may be distinguished: 



1. Pure Hog Cholera (septicemic form) . In this the autopsy 

 findings correspond to those of an acute hemorrhagic septicemia, 

 namely hemorrhages in the serous membranes and in the 

 mucous membranes of the pharynx, stomach and intestines, in 

 the acutely swollen lymph glands and probably also in the kid- 

 neys. Further there is also a moderately acute swelling of the 



spleen. In the 

 meantime in 

 some cases the 

 peritoneum is 

 covered with a 

 fibrinous pseudo- 

 membrane, and 

 the intestinal 

 walls are hemor- 

 rhagic. Even in 

 such cases fine, 

 croupous pseu- 

 do-membranes 

 may frequently 

 be found on the 

 swollen and hy- 

 peremic mucous 

 membranes of 

 the stomach and 

 intestines, some- 

 times also a dif- 

 fuse, superfixjial 

 necrosis (bile 

 stained, fnushy 

 deposits) , or here 

 and there yel- 

 lowish scales. 



2. Intestinal 

 Form. In this 

 most frequent 

 form of the dis- 

 ease, the intes- 

 tinal tract, es- 

 pecially the cae- 

 cum and the 

 large intestines, 

 show intensive changes. In the less acute cases a hard 

 round nodule may be felt on palpation of the wall of the large 

 intestines, or the wall is thickened either in part or uniformly 



Fig. 50. Intestine of hog with follicular ulceration of hog 

 cholera. 



