FARM ANIMALS 235 



not be distinguished except by microscopic study. 

 No remedy is known for either hog cholera or 

 swine plague and thus far vaccination for these 

 diseases has not given uniformly good results. 

 The work of the Bureau of Animal Industry 

 and various experiment stations along this line 

 gives promise of a satisfactory solution of the 

 problem. 



In order to avoid infection with this disease 

 it is desirable to watch the food and water supply 

 carefully and to quarantine hogs from suspected 

 localities for thirty days before allowing them to 

 run with the farm herd. It is also a good plan 

 to move the hog yard from time to time to different 

 parts of the farm. In this way the old yards 

 may be plowed up and cultivated and the hogs are 

 kept in clean quarters and the filth is not allowed 

 to accumulate indefinitely. 



Hogs often become infested with lice and other 

 parasitic insects, as well as with the mange. 

 Mange appears first on the head and later, if 

 untreated, may spread over the rest of the body. 

 This disease may become so serious that it is 

 desirable to dip the hogs every month or so during 

 the warm season. The materials which are most 

 frequently used for this purpose are zenoleum, 

 chloronaptholeum, and lime and sulphur. The 

 first two remedies may be used in a solution of 

 three to four per cent. Hogs infested with lice 

 may also be sprayed or dipped in a mechanical 

 mixture of water and kerosene or crude petroleum. 

 Some hog raisers have found a successful device 

 in keeping rubbing posts smeared with crude 

 petroleum. In this way the hogs treat themselves- 

 Hogs may also become infested with kidney 

 worm and various intestinal worms and lung 



