654 
B. F. KAUPP. 
In cattle infection principally takes place through the respir¬ 
atory track ; the lungs and adjacent lymph glands being most 
often primarily affected ; but it is not uncommon to find milk 
cows with the peritoneum and other organs of the abdominal 
cavity affected and find no visible lesions in the thoracic cavity. 
In swine it appears to be quite different ; the infection seems 
to be through the digestive tract. We may find it invading 
the lymphatics, in some instances, in all parts of the body. In 
others confined to the lungs and other organs of the thoracic 
cavity, while other times to organs of the abdominal cavity, and 
rarely in bone alone. I have seen two cases of tubercular arthri¬ 
tis, one of the carpal joint, the other of the tarsal. It has been 
thought by some investigators that the primary lesions of tuber¬ 
culosis in swine was in the abdominal cavity, principally in the 
spleen and liver, with adjacent glands. It had also been noticed 
that in hogs where the abdominal or thoracic lesions were pres¬ 
ent the submaxillary or other lymph glands of the head were 
almost invariably invaded. Further investigation has shown 
that in the hogs of the central States the primary lesions 
are most always in the glands of the head, the submaxillary 
being the gland most often affected, very rarely the salivary 
glands. Of 200 cases 55 were found to be localized principally 
in the submaxillary lymph ganglions, no other visible lesions 
present; 45 per cent, were generalized, but the per cent, may 
vary in different herds; of those that were generalized the 
organs most affected were the spleen and liver and adjacent 
lymph glands, next the bronchial and mediastinal lymph gan¬ 
glions and lungs, pleura and intestines less frequent. Occa¬ 
sionally there may be found a case of generalized tuberculosis 
affecting the principal lymph ganglions of the body. 
In one case I call to mind was found the submaxillary, pre¬ 
pectoral, bronchial, portal, colic, ileocsecal, mesenteric and other 
lymph glands, with no visible lesions in the organs. While, on 
the other hand, there has been found lesions in the liver and 
spleen or lymph glands of the abdominal cavity, with no lesions 
in the head or thoracic cavity, and also infection in the lungs 
