I20 DISEASES OF SWINE 



When an outbreak occurs in a neighborhood, 

 precautions against the spread of the disease to 

 neighboring herds are riot taken, and it becomes 

 distributed about by people, dogs, and other farm 

 animals, birds, etc. Swine breeders, as a rule, do 

 not recognize the danger of carrying the germs 

 in the mud and filth that may accumulate on the 

 shoes of a person who has walked through yards 

 where hogs are dying of hog cholera. Dogs, 

 horses, cattle and wagons may act as carriers of 

 the germ in the same manner. Pigeons, because 

 of their habit of feeding in the hog lots in differ- 

 ent parts of the neighborhood, are also carriers 

 of the germ. The opportunity for crows, buz- 

 zards and dogs to distribute the disease is not 

 great in sections of the country where the car- 

 casses of the dead hogs are disposed of by burn- 

 ing or burying. 



The drainage from infected yards is a dangerous 

 source of infection. Streams running through an 

 infected district may distribute the disease to all 

 hog lots boi-dering on its banks. If the hogs' 

 water supply comes from such a source, or the 

 animals allowed to wallow in the stream, disease is 

 almost sure to occur. 



Age is an important predisposing factor in 

 young hogs, and may be greatly increased by 

 crowding them into too close quarters and by 

 feeding an unsuitable ration. The feeding of a 

 one-sided ration of corn does not meet the needs 

 of the system in growing animals, and they soon 



