HOG CHOLERA 277 



therefore that will cause the spread of this virus or of the 

 germs, will be responsible for the spread of the disease. 

 Very often when the disease breaks out in a neighbor- 

 hood, the adjoining farmers will come to investigate and 

 offer advice, and by so doing they may carry away a suffi- 

 cient number of germs on their boots to spread or produce 

 the disease in their own herds. Dogs running across the 

 country, and even crows flying from a yard containing 

 the disease to a healthy herd, are supposed to carry suf- 

 ficient germs to start the disease. The wind blowing 

 particles of dust from one place to another will also carry 

 with it sufficient of these germs to start the disease. 



PREVENTION OF THE DISEASE. 



Thus far there has not been discovered any means by 

 which this disease can be cUred ; the only safeguard, 

 therefore, is prevention. Since hog cholera, as herein out- 

 lined, seems to be a corn belt disease, it would indicate 

 that improper feeding is the direct cause of an outbreak 

 and the prevention, then, would be proper feeding. If a 

 herd is properly fed so that it has strong resistant powers, 

 there is apparently no danger of the disease breaking out. 

 From what has been stated, if the disease is in the neigh- 

 borhood, there is danger of it being carried to other herds, 

 and it is well to have every means of prevention at hand. 



The quarantine method is adopted either to prevent the 

 disease from gaining entrance to a herd, or to prevent its 

 spreading after it is once started in a herd. In order to 

 prevent a herd from contracting the disease, provided it 

 has developed in the community, the herd should be thor- 

 oughly quarantined. That is, it should be completely 

 isolated from all external communication so that there 

 will be no possibility of the germs being carried to it. A 



