374 



DISEASES OF SWINE 



With the proper number of assistants these small hogs can 

 be handled very rapidly, and 30 to 50 injected in an hour. 

 Thoroughness is, however, of far greater importance than haste, 

 and plenty of time should be taken to see that every part of the 

 work is thoroughly done. 



After the pigs have been injected they are turned loose and 

 allowed to run. The serum has no bad effects, and the hogs need 

 no extra care following its use. There are a few points of import- 

 ance that will bear mention at this point. 



Fig. 72. — Showing method of "snubbing" large hog for injection of serum. 

 Serum injected into muscles of ham. (Photo by H. K. Mulford Co.) 



The next morning after the injection has been given the 

 shoats will all show up stiff and lame, and the owner might be 

 led to the behef that they were sick with cholera. This is not the 

 case at all. The shoats are simply stiff in the hind Umbs on account 

 of the swelling and tenderness produced at the point where the 

 serum was injected. This large amount of foreign material placed 

 in the tissues is sufficient to produce quite a severe local reaction. 

 This naturally causes the hogs to be stiff and sore for a few days. 

 Ihey soon warm out of this lameness, and after a few days it 

 entirely disappears. 



