2 G 
W. E. HOWE. 
appear after they are dressed and hung in the cooler. The 
hogs frequently die from exhaustion, heat and asphyxiation. 
In these cases we would have in the flesh a large amount of the 
waste matters of the body, which have not been thrown off, and 
being full of blood, putrefaction soon starts, consequently the flesh 
would be filled with the ptomains of putrefaction, which are 
putressen and cadaverine. These ptomains are capable of pro¬ 
ducing strong inflammation and necrosis. Cadaverine is one of 
the substances which can set up suppuration in the absence of 
bacteria. In Asiatic cholera the necrosis of the intestinal 
epithelium and the muscular spasms are thought to be due to 
this same product. 
Tuberculosis.—In tuberculosis the pathological lesions of 
the disease are so well known that I will only make a few re- 
marks which will apply especially to the disease in swine. It 
originates most commonly from ingestion, so that the disease 
does not appear first and most prominently in the lungs and 
respiratory tract, but in the digestive organs and their accessory 
glands, principally in the liver and spleen. Here it is seen either 
as miliary granulations scattered in great numbers throughout 
the thickness of the organ, or else of rounded nodosities, which 
are yellowish white in color, varying in size from that of a pea 
to that of a hazel nut. 
On section they appear sometimes softened in the centre, 
but rarely infiltrated with calcareous salts. Lesions similar to 
those of the liver may be seen in the lungs in severe cases, but 
generally there is found in these organs an innumerable quan¬ 
tity of minute gray granulations caused by generalization 
through the blood stream, in which case the liver, the spleen, 
the kidneys, the medulla of bones and the mammae usually in¬ 
filtrated with similar growths. Cases are sometimes seen in 
which the disease appears to be localized in a few glands. The 
tonsils and the pharyngeal or submaxillary glands are the ones 
most often affected. They become voluminous, hard and 
knotty, as they have undergone a true fibrous transformation ; 
here and there small yellow foci are seen of a softer consistency, 
