GENERAL SWINE MANAGEMENT 23 



after their arrival on the farm, and some shippers have claimed 

 that it is profitable to given even a third injection of the bacterin 

 about a -week after the second injection. 



Swine plague is manifested in hogs by a cough, nasal discharge, 

 thumps and general depression. As a rule, this disease does not 

 spread as rapidly as cholera and only a few animals in the herd 

 will be observed in the beginning. The disease gradually affects 

 others until ultimately perhaps 50 to 75 per cent of the shipment 

 will be affected. Swine plague is not as fatal as hog cholera but it 

 is a serious disease, because it produces a loss in condition, and such 

 animals require much more feed for fattening than those that have 

 not been affected. 



Infectious necrotic enteritis results from various organisms affect- 

 ing the mucous membrane of the intestine and is evidenced by diges- 

 tive disturbances consisting of irregular appetite, diarrhea, and the 

 animals appear gaunt, weak and depressed. This disease, like swine 

 plague, is not rapidly extended through a herd of hogs and is not 

 as fatal as hog cholera, but is of very great economical significance 

 because it produces a loss in condition that is expensive to overcome. 



In conclusion, it may be said that the stock hog business will be 

 profitable for the feeder, provided he uses care and judgment in the 

 purchase of his hogs, in designating that they be given the triple 

 treatment, not overloading the cars and seeing to it that the animals 

 are protected in the car while enroute and are provided clean dry 

 quarters at destination and ample rest before they are taken to the 

 farm, and given proper feed thereafter. 



Breeds of Swine 



The number of hogs in the United States has varied from 60,000,000 

 to 76,000,000 in round numbers during the last decade. The exact 

 number of registered pure-bred hogs in the United States is not 

 known. According to the report of the secretary of the National 

 Swine Growers' Association, there were 331,040 pure-bred hogs reg- 

 istered in 1918, and it is probable that there are less than one million 

 pure-bred hogs registered in this country at this time. There are some 

 pure-bred hogs that are not registered, but it is surprising that there 

 is such a small percentage of hogs in this country that are pure- 

 bred. At the present time, there are splendid opportunities for those 

 interested in swine production to raise pure-bred hogs. Market 

 fluctuations have little effect upon the price of pure-bred breeding 



