DISEASES OF THE HOG. 123 
CHAPTER X. 
DISEASES OF THE HEART. 
Disease of the heart is of very rare occurrence 
as an independent disease in the pig, as their life 
is short and the great majority of them are sent to 
market before it has time to develop; but the heart 
is very frequently affected in conjunction with 
other diseases. Although I have had no well 
marked cases of this derangement in the pig and 
there has been nothing written on this subject, yet 
I have no doubt but that some of the sudden deaths 
which sometimes occur in the hog are due to some 
form of heart disease. The animal is usually in 
such apparent good health up to the time of death 
that no warning is given and it is only after mak- 
ing a post mortem examination that the true nature 
of the disease is discovered. 
PERICARDITIS 
(INFLAMMATION OF THE PERICARDIUM.) 
Pericarditis is an inflammation of the capsule 
surrounding the heart and reflected over it. Endo- 
carditis is an inflammation of the membrane lining 
the cavities of the heart. Carditis is an inflamma. 
tion of the substance of the heart itself. As it is im- 
possible to diagnose the one from the other in the 
