164 DISEASES OF SWINE 



However, some writers believe that lice are important 

 agents in the spread of hog cholera. 



Treatment. — The habits of hogs, and the diffi- 

 culty in destroying the lice scattered around the 

 hog houses and yards make it a task to free a 

 herd from' lice. Those on the bodies of the hogs 

 are easily destroyed by dipping, spraying, or 

 sprinkling with such remedies as the tar disin- 

 fectants, kerosene emulsion, and the different 

 preparations used for dipping sheep. But unless 

 the necessary precautions are taken against re- 

 infection from the surroundings, the relief is only 

 temporary. 



Two per cent, water solutions of the tar dis- 

 infectants are the best remedies for lice. They 

 are best applied by dipping and in large herds 

 a dipping tank is a necessity. In order to kill 

 the young lice that have hatched from the eggs, 

 the hogs, should be dipped two or three times at 

 intervals of about two weeks. There should be 

 enough of the solution to cover the animal, when 

 it jumps into the tank. 



Kerosene emulsion is usually applied with a 

 spray- pump or sprinkling can. The following 

 formula can be used: Hard soap, one pound; kero- 

 sene, t^ifo gallons, and water, four gallons. One part 

 of the emulsion to eight parts of water can be used. 

 Five parts of water and one of kerosene may be used 

 if the spray pump has an attachment for mixing 

 the oil arid water. Water solutions of the tar 

 disinfectants may be applied in the same way as 



