234 HOG CHOLEEA 



These three practices have essentially the same 

 relation to hog cholera eradication that the feed- 

 ing of uncooked creamery products has to the 

 eradication of bovine tuberculosis. They furnish 

 obvious and wide-open routes for dissemination 

 of the virus. Are they really necessary evils? 

 Are there no possible ways to avoid them? Let 

 us examine the three practices more in detail. 



Marketing from infected herds. We have al- 

 ready shown that marketing from infected herds 

 is a common practice, that it serves to spread hog 

 cholera virus as the animals are driven to market 

 and when trimmings from their carcasses later 

 find their way into garbage that is fed to suscep- 

 tible hogs. We have also drawn attention to the 

 fact that feeders selected from these herds and 

 shipped to distant points cause many new out- 

 breaks of hog cholera. For our present purpose 

 it remains to review briefly means by which this 

 endless chain of infection can be severed. 



The first object should be to keep cholera in- 

 fected herds at home. Good local veterinary serv- 

 ice will do much in this direction for it is the ill- 

 advised breeder who ships his infected hogs to 

 market. On the part of the meat inspection serv- 

 ice, rigid interpretations of lesions in all indi- 

 viduals that come from lots obviously infected 

 with hog cholera at the time they reach the yards 



