302 DISEASES OF SWINE 



(17) Disinfection of Pens. — All pens in which cholera-infected 

 animals have been kept should be most carefully cleaned and dis- 

 infected after the animals have been removed or the disease has run 

 its course. This cleaning-up process should include raking up of all 

 cobs, loose boards, old litter, manure, etc., and destroying same by 

 burning. Then the pens should be thoroughly sprinkled with 

 chlorid of lime and some good germ-destroying solution sprayed 

 over them, such as liquor cresolis compound. Following this, 

 give sunlight and fresh air a good chance at them. By this means 

 the lots can be entirely rid of disease germs within a period of six 

 months; otherwise they remain dangerous for a year or more. 



In this cleaning-up process it is especially necessary that we 

 clean up all dirty corners, remove any tumble-down hog sheds, and 

 drain out and disinfect any insanitary hog wallows. 



(18) Exhibiting at Fairs. — ^We must always bear in mind the 

 dangers which go with the showing of animals at public fairs and 

 exhibits, where they are brought in contact with animals from 

 all parts of the country, many of which may have traveled in in- 

 fected cars or been exposed in other ways to danger of infection 

 on the way to the exhibit. The larger the exhibition, of course, the 

 greater the danger. 



The only safe methods by which we can meet this danger is to 

 either have all animals intended for exhibition purposes properly 

 immunized by serum-simultaneous treatment while young, or else 

 quarantine on our own premises for a period of thirty days all 

 animals used for exhibition purposes as soon as they return home. 

 If we keep the show animals separate for thirty days after their 

 return from the fair they will have opportunity to develop the dis- 

 ease, if they have by any chance become infected, and we will thus 

 be able to prevent the entrance of the disease into the entire herd. 

 The outbreak of the disease among the show animals will, of 

 course, mean a considerable loss if it should occur, but" it will be 

 less severe than if the entire herd had become infected. The 

 better way, of course, is to immunize the animals before sending 

 them to any exhibition of this kind. By this practice we avoid all 

 loss and remove the necessity for quarantine. 



(19) Destruction of Stunted Animals. — Usually after an out- 

 break of cholera in a herd there will remain one or two animals at 



