HOG-CHOLERA 279 



Disposing of Dead Hogs.— The carcasses of the dead liogs 

 should be burned. Before placing the carcass on the fire, it 

 should be cut open and several long incisions made through the 

 skin. A crematory niav be made by digging two cross trenches 

 that are about one foot deep at the point where they cross, and 

 shallow at the ends. Iron bars or pipe may be laid over the 

 trenches where they cross for the carcass to rest upon, or woven 

 wire fencing securely fastened with stakes may be used in the 

 place of the iron bars. If the carcass is disposed of by burying, 

 it should be buried at least four feet deep and covered with 

 quicklime. 



Disinfecting the Yards and Houses.— If the sick hogs are 

 moved to new quarters at the beginning of the outbreak, the hog 

 houses and yards should be cleaned and disinfected (Fig. 84). 

 The manure and all other litter should be hauled away to a field 

 where there is no danger from this infectious material becoming 

 scattered about the premises, leaving a centre of infection in the 

 neighborhood and causing outbreaks of cholera among neighbor- 

 ing herds. It may be advisable to burn the corn-cobs and other 

 litter that have accumulated about the yards. Loose board floors 

 should be torn up and the manure from beneath removed. 

 Portable houses should be removed. The floors, walls of the 

 house and fences should be first cleaned by scraping off the filth, 

 and then sprayed with a three per cent water solution of a cresol 

 or coal tar disinfectant to which sufficient lime has been added 

 to make a thin whitewash. Three or four months of warm, sunny 

 weather are sufficient to destroy the cholera infection in well- 

 cleaned yards. 



Anti-hog-cholera Serum. — The credit of developing the first 

 and at present the only reliable anti-hog-cholera serum and 

 method of vaccination belongs to Drs. Dorset and ]^iles. Anti- 

 hog-cholera serum came into general use in 1908, and all of the 

 swine-producing States have established State laboratories for 

 the production of this serum. 



