170 



DISEASES OF SWINE 



simply burning up the body of the animal and drying all the water 

 out of his tissues. 



When cholera animals have the range of a pasture in which 

 there is a running stream the dead hogs are usually to be found 

 either in the stream or close by its banks. 



In a very large number of cholera cases the sick animal, if 

 aroused and forced to get out of the litter and move about, will 

 take a few staggering steps, then stand with the back arched, the 

 flanks drawn up, the hind legs crossed, the tail drooping, the head 

 low, and start to cough. This cough of cholera is more or less 



Fig. 51. — Typical case of hog-cholera. Nott 

 and cough. 



loop oi tail, arching of back, 



pecuhar. It has something about it that is different from any 

 other cough which hogs have, and once it has been heard it is not 

 hard to tell when you hear it again. It is a sort of dry, suppressed, 

 barking cough, but has to be heard to be fully appreciated. Many 

 experienced veterinary surgeons and livestock men can tell it the 

 minute they hear it, and can made a pretty good guess on the 

 diagnosis of the case without even seeing the sick hogs at all. 



This cough, however, is not present in all cases. It is more com- 

 mon and more severe in those cases where there is severe cholera 

 infection of the lungs and other organs in the chest. I have, 

 however, seen many sick hogs which had a very severe cough dur- 



