108 DISEASES OF THE HOG. 



ute); the heart's action is rapid, jerky, disturbed, 

 and tumultuous, but takes strength; auscultation 

 of the chest is not satisfactorily made in the pig; 

 but in some cases where the animal will lie quiet a 

 minute crepitation or a fine sharp crackling sound 

 Avill be heard; this sound may be diffused or it may 

 only be detected in portions of the lung, but usually 

 no distinct sound will be heard. Congestion of the 

 lungs occurring as a result or in connection with 

 other diseases, although the symptoms are not to 

 all appearances so severe, are generally more fatal 

 than when the result of over exertion. 



Terminations: The great majority of cases which 

 are severe and acute unless prompt treatment is 

 had recourse to will terminate fatally. The condi- 

 tion of the congested vessels rapidly causes death 

 from asphyxia. Milder cases may terminate in in- 

 flammation of the lungs. 



Post Mortem Appearance: In pigs which die of 

 this disease the lung tissue will be found greatly 

 distended with dark colored fluid blood with occa- 

 sionally circumscribed effusion of blood from rup- 

 ture of minute and capillary vessels. The lungs are 

 swollen and of a darker color than natural and 

 their crepitant character is much diminished, al- 

 though not altogether gone. Their normal elastic- 

 ity and spongy texture is somewhat destroyed and 

 although heavier than natural, still they will float 

 on water. When the surface is cut there will be an 

 oozing of blood and if squeezed it will drip as if 

 from squeezing a sponge, and it is rendered frothy 

 from the entanglement of air. The lining mem- 



