534 DISEASES OF SWINE 



should be tuberculin tested, and those that react should be removed 

 from the herd or at least removed from the feed lots where hogs 

 are also kept. All skimmed milk from creameries should be steril- 

 ized by heating before being returned to the farms for feeding to 

 hogs. Kitchen refuse, which often contains sputum from tuber- 

 culous human beings, should not be used as an article of food for 

 hogs. 



Further steps for the prevention of the disease consist in thor- 

 ough attention to the sanitary conditions of the feed lot and 

 sleeping quarters. Clean, dry feed lots, light, airy, well-ventilated 

 and sunshiny sleeping pens are important essentials in preventing 

 the occurrence of swine tuberculosis. In introducing new breeding 

 stock it is a wise precaution to require a tuberculin test of the new 

 animals in order to make certain that they are free from the dis- 

 ease. With the intradermal method of making the test this is a 

 very simple procedure, and one that should not be neglected. 



