LO 



Bog Choleba. 



field or wood lot and allowed to decompose and be eaten by animals 

 or buzzards which in turn may carry the organisms of the dead car- 

 casses on their bodies and drop pieces of the infected flesh over the 

 surrounding farms. The buzzard will drop his manure or light and 

 wipe his filthy infected feet in the nearest hog lo1 or throw up the 

 infected contents of his crop on an enemy as a means of protection, 

 and then fly away to infect another neighboring farm. 



THE INCUBATION PERIOD. 



The incubation period is the length of time between the expos- 

 ure of the hog to the disease and the development of the first signs 

 of sickness in the hog. This varies from a few days to two or three 

 weeks and depends somewhat on the age of the animal, its physical 

 condition, the way in which it is exposed to the disease and the 

 strength and vitality of the germ causing the disease. In the be- 

 ginning of an outbreak, the germs are usually the strongest and 

 after the disease has run a course of two or three months it may lose 

 its strength and not attack the hogs that are three or four years old. 



Rail pen showing where eleven shoats died from cholere. 



SYMPTOMS. 



When hogs are becoming sick with cholera, the first thing the 

 farmer will notice is that sonic of them become gaunt and their 



