THE MOST COMMON DISEASES OF SWINE 555 



tablishments rliat keep both hogs and cattle make pro- 

 visions effectually to prevent the access of the former 

 to the manure heap on which the droppings of the latter 

 are thrown. No farmer or stockman intentionally prac- 

 tices a swstem of feeding that is lacking in economy, and 

 to know the benefits that are derived by hogs from the 

 manure heap of stables containing heavily grain-fed dairy 

 or beef cattle immediately causes its location in the hog 

 yard. This practice is not harmful when the cattle are 

 healtliy. but when they are affected with tuberculosis, it 

 means, in the light of the evidence we now have, an al- 

 most certain transference of the disease to the hogs." 



The tuberculin test used upon cattle is practicable for 

 hogs, and its results fully as reliable, if the hogs are kept 

 (|uiet throughout the test and for some time before. This 

 was demonstrated by the Bureau of Animal Industry 

 (Bulletin No. 88). As keeping hogs quiet is ordina- 

 rily quite difficult, and yet essential, the application of 

 tlie test to swine is a more uncertain undertaking than 

 it is with cattle. 



SOME INTESTINAIi AND OTHER WORMS 



The hog is host for a ^•ariety of intestinal worms. 

 It is doubtful if more than a small percentage of swine 

 growers realize the extent to which hogs are, ordinarily, 

 infested with worms, or the menace these parasites are 

 to the health, thrift and lives of their animals. One 

 intelligent observer ventures to express the belief that 

 lirdf the ills or diseases which afflict swine are traceable, 

 directlv or indirectlv. to worms. A ho«- afflicted with 



