The Prevention of Hog Diseases 481 



quicklime. The yards should be cleaned; piles of old 

 lumber and rails hauled away ; portable hog-houses moved 

 about, so as to permit cleaning under them ; straw stacks, 

 straw sheds, and manure piles hauled to a field and plowed 

 under if possible; and muddy places drained, filled, or 

 fenced off. If there are any places into which hogs 

 crawl or sleep under buildings, they should be cleaned if 

 possible, or closed up. The yard or yards should be 

 covered with quicklime, and a disinfecting solution 

 applied to the walls and floors of the hog-houses. The 

 most reliable disinfectant is 3 per cent water solution of 

 liquor cresolis compound with sufficient hydrated lime 

 added to make a very thin whitewash. This should be 

 applied to the cleaned surface with a spray pump. The 

 feeding floors, troughs, and self-feeders should receive 

 frequent disinfecting. 



The double method of vaccinating hogs for permanent 

 immunity is practiced in sections of the country where 

 the disease is common. This method of vaccination 

 consists in injecting a certain quantity of anti-hog-cholera 

 serum and hog cholera blood at different points beneath 

 the skin or subcutaneously. Serum only or the single 

 method of vaccination or treatment may be used for pro- 

 ducing a temporary immunity, or treating cholera hogs. 



Tuberculosis. 



Tuberculosis is one of the oldest animal diseases on 

 record. It is only within the last few years that stock- 

 men have realized the extent to which tuberculosis has 

 spread among swine. The direct or specific cause is 

 Koch's Bacillus tuberculosis. This bacillus has greater 

 vitality than the hog cholera virus, and it is able to resist 

 high temperatures, changes in temperature, drying, and 

 2i 



