CHAPTER VIII 



ORGANS OF LOCOMOTION 



Sore feet Osteomyelitis (purulent) 



Fatty changes in muscle Trichinosis 



T,, , . f muscular Cysticercosis 



-Rheumatism J . , „ -,. . 



1 articular iSarcosporidiosis 



Polyarthritis Tumors 



Osteomalacia 



Under this heading will be considered the diseases of the volun- 

 tary muscles, bones, and joints. A great variety of malformations 

 of the organs of locomotion have been observed in swine. Multiplicity 

 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 loco- 

 motion 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 trouble- 

 some in swine as in the larger animals, and are usually repaired 

 rapidly and frequently without intervention of the surgeon. 



SORE FEET 



The feet of swine that are kept on pavements or driven long dis- 

 tances over hard roads become sore. This condition is attracting 

 the attention of serum producers who are required by the govern- 

 ment 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 hyperimmune swine 

 for the required time because it is difficult to keep the pens free 

 from filth when bedding is used. 



Sore feet due to rough, hard roads and pens also occasion some 

 trouble in swine. This condition caused more concern in former 



