178 
Fig. 39. 
TUBERCULOSIS IN SWINE 
TUBERCULOUS SPLEEN 
FROM A PIG. 
kind of necklace of unequal and knotty 
tumors, reaching from ear to ear and be- 
coming larger under the neck between the 
rant of the lower jaw. Similar tumors 
may be developed at the thoracic inlet, 
behind the shoulder or in the groin, 
which, as they increase in size, become 
harder and more adherent to the neigh- 
boring tissues. Sometimes, however, a 
slight fluctuation is perceptible. The 
tumor may suppurate and discharge a 
small quantity of a thick and grumous 
pus, but the glandular tumor does not 
disappear and the opening into the 
abscess remains for a long time as a 
fistula. 
There may be swellings of the bones, 
causing a true tuberculous arthritis when 
the Jesions happen to be situated at the 
level of an epiphysis. Persistent lame- 
ness, fistulous wounds suppurating indef- 
initely, necrosis and caries, are the com- 
plications of the lesions of the bone, the 
development of which is always ex- 
tremely slow. 
Morbid anatomy. The manifestations 
of tuberculosis in swine are exceedingly 
interesting. Nocard found the lesions to 
consist of miliary granulations which rap- 
idly become caseous, as in cattle, but 
which more rarely contain calcareous salts. 
Generalization is common, in which case 
the viscera are thickly sprinkled with 
gray granulations which are translucent 
throughout, or opaque in their centers, 
and quite analogous to those found in 
tubercular lesions in other animals. 
As the disease most often results from 
ingestion of the virus, the digestive 
apparatus and the corresponding lympha- 
