SECTION IV 

 ORGANS OF LOCOMOTION 



UNDER this heading will be considered the dis- 

 eases of the voluntary muscles, bones, and joints. 

 A great variety of malformations of the organs 

 of locomotion have been observed in swine. Multi- 

 plicity of legs or duplication of portions of a leg are 

 relatively common, and fusion of parts ordinarily separate 

 is occasionally encountered. These abnormalities may 

 be so adverse to the existence of the animal that it dies 

 soon after birth, or the anomaly may be so slight that 

 the animal is in no way inconvenienced and develops 

 into maturity. 



Injuries of various kinds are prone to damage and 

 possibly destroy the usefulness of the part affected, and 

 thus interfere with the locomotion of the animal to such 

 an extent that it must be sacrificed. Muscle wounds 

 usually give little trouble in swine because of their 

 marked resistance to infection, while fractures are not 

 so troublesome in swine as in the larger animals, and are 

 usually repaired rapidly and frequently without inter- 

 vention of the surgeon. 



Sore Feet 



The feet of swine that are kept on pavements or driven 

 long distances over hard roads become sore. This con- 

 dition is attracting the attention of serum producers 

 who are required by the government regulations to keep 

 the hyperimmune swine on concrete or other similar 

 floors. Those producers depending upon tail bleeding 

 are having considerable difficulty in keeping the hyper- 

 immune swine for the required time because it is difficult 

 to keep the pens free from filth when bedding is used. 



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