112 DISEASES OF THE HOG. 
somewhat resembles the liver; on this account it is 
termed hepatized. When pressed between the 
fingers a reddish fluid will ooze out. The cut sur- 
face of the lung exhibits numberless minute gran- 
ules which are probably the air cells filled with a 
concrete fibrous exudation. In red hepatization 
the bronchial tubes, the blood vessels, and the in- 
terlobular areolar tissue are still obvious to exam- 
ination. The lungs do not collapse upon exposure 
to the atmosphere, as they do in health. In the 
third stage there are two conditions, namely gray 
hepatization and the other abscess. In the former 
the lung is compact and of a gray color, both ex- 
ternally and internally, and when cut into a yellow- 
ish opaque purulent fluid mixed with blood is seen. 
It is much softer than red hepatization and if lifted 
will likely fall to pieces. In the abscess stage the 
’ lung may be a mass of abscesses or single ones. I 
-have seen cases in which one of the lungs was a 
mass of matter held in by the membrane covering 
the lung. If the hepatization is extensive the ani- 
mal usually dies before it has time to break down 
into pus, but if only one lung is affected the animal 
may live long enough for it to do so. Gangrene is 
not a common result of pneumonia in ordinary 
cases, but I have often found the lungs in this con- 
dition in pigs that died from hog cholera or swine 
plague. ‘ ; 
Treatment: In no disease is it more important 
to make a proper discrimination in the treatment. 
The measures which would be beneficial in one case 
wight cause a fatal termination in another. Ani- 
