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 which 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- 
wal 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- 
what resembling the bark of a dog. There mus: 
