130 CANINE DISTEMPER 
by infection with various micro-organisms, particularly 
the pyogenic cocci, and the B. col’ communis. Animals 
which have become greatly debilitated, or which are 
in the last stages of a fatal attack of distemper, very 
frequently exhibit cystitis upon post-mortem examina- 
tion. The condition is often unnoticed in life; indeed, 
it is fairly effectually cloaked by the symptoms arising 
Fic. 14.—PAassING THE CATHETER. 
The prepuce must first be drawn back. 
from the other numerous complications of the attack, 
unless severe in character. 
A dog may appear to void urine in an apparently 
normal manner throughout, never leading the attendant 
to suspect suppression or the necessity for passing a 
catheter; but upon autopsy great vesicular distension 
is not infrequently discovered. The urine passed is 
merely an overflow, the bladder being no longer able 
