96 FISTULA AND POLL-EVIL 
ers is by far the best example we have in 
domestic animal pathology. Its symptoms are 
seen in the unthrifty and enfeebled state of 
the patient and in its susceptibility to other 
diseases, particularly to new infections after 
Tuc. 11—A Compricatep Case oF Fistuta ANp Po it-EvIt. 
operations, and to pheumonia—the common 
form of dissolution of so many diseases. 
Pneumonia 
The pneumonia arising as a complication of 
fistula of the withers occurs chiefly in old debil- 
itated subjects or in younger animals reduced 
to a state of general enfeeblement from neglect 
and exposure. It is sometimes also metastatic- 
abscess of the lungs—the infection is carried 
from the purulent hot bed to the pulmonary 
