160 SWINE DISEASES 



later the cells become infiltrated with fat. The heart is 

 enlarged, is paler in color, and its density is diminished. 

 No visible symptoms are evident, in the majority of these 

 cases the swine being excessively fat and refusing to move 

 about without urging. No treatment is required unless 

 this condition arises in a breeding animal. 



Endocarditis 



Endocarditis has been observed by inspectors and in 

 diagnostic autopsies, but the disease is not ordinarily 

 recognized by the clinician. The lesions found usually 

 consist of vegetative growths or denuded areas upon the 

 endocardium, covering the valves. Either condition is 

 always associated with infection, and it is not difficult to 

 demonstrate bacteria in the lesions. 



Tumors 



Various tumors have been observed upon the peri- 

 cardium and also in the myocardium. They are of no 

 clinical significance, but are of interest to inspectors, 

 as the presence of malignant tumors is considered suffi- 

 cient evidence for condemnation. 



Parasites 



The pericardium rarely harbors the cystic form of the 

 Tsenia echinococcus, but Cysticerus cellulosse is of com- 

 mon occurrence in the myocardium of swine. The lesion 

 has the same general appearance as it does in voluntary 

 striated muscle. Sarcosporidiosis is not uncommon in 

 the heart muscle of swine. 



BLOOD VESSELS 



Diseases of the blood vessels of swine have received 

 very little consideration, though a few cases of aneurism 

 have been recorded. Thrombosis has been observed in a 

 very few instances. Inflammatory disturbances have not 

 been reported, or at least the available literature contains 

 no records of such affections. Phlebitis has been observed 

 by serum producers. This condition has occurred in the 



