DISEASES OF THE HOG. 187 



ten by a mad dog only three died. Dr. John Hun- 

 ter states that he knew an instance in which twen- 

 ty-one were bitten and only one died. The germ of 

 hydrophobia lodged within the animal body re- 

 quires time for its reproductive process to be com- 

 pleted, and this process may be hastened or re- 

 tarded by various conditions w^hich are not easily 

 made out. It usually, I suppose, if conditions are 

 favorable, takes place about the twentieth day, 

 seldom before that period, or it may take from one 

 to three months. Cases have been reported in 

 man in which it made its appearance after several 

 years; in one case ten years. 



The symptoms of the disease in the hog resemble 

 very much those in the dog. The animal has at 

 first an altered look, is very restless and frequently 

 changes his position, will often be seen to rub a 

 certain part of its body, and if it should be within 

 reach of its mouth will bite at it, and if the part is 

 examined there will be found a scar, the seat of the 

 bite; it will be somewhat swollen and if the skin 

 was white it will be changed to -red, it may even 

 break open again. There is no doubt but what the 

 animal feels it either itchy or painful. The ani- 

 mal has a disposition to pick up and swallow dirt 

 of any kind and occasionally vomit. In some cases 

 it becomes irritable and will bite at anything that 

 comes in its way, or may run at other pigs. There 

 is a flow of saliva from the mouth, caused more or 

 less by a champing of the jaws. The voice of the 

 animal is changed into a spasmodic grunt, some- 

 w'hcA resembling the bark of a dog. There mus! 



