504 
WYATT JOHNSON. 
LOCAL TUBERCULOUS ABSCESS IN A BULL 
By Wyatt Johnson, M.D., Montreal. 
[Paper read before the United States Veterinary Medical Association.] 
The importance which now attaches to the early recognitior 
of tuberculosis in herds of valuable cattle, makes it of interest tc 
record the following unusual case : 
On March, nth, 1890, I received from Dr. D. McEachran 
of Montreal, a specimen of pus, with the statement that it came 
from a small abscess about the jaw of a valuable thoroughbrec 
bull, and the owner of the animal feared that it might be suffer¬ 
ing from tuberculosis. 
The history of the stock did not give any evidence of tuber¬ 
culosis having occurred among the other animals, though it hac 
appeared about two years before on an adjoining farm, and the 
present subject had served a cow in this herd during the previous 
season. 
The present animal, a fine, strong, healthy-looking bull, four 
years old, was always in perfect health till two months previous 
when the attendant noticed a swelling beneath the jaw. This 
suppurated and was opened, but did not heal up. Recently an¬ 
other small abscess formed in the neck which also did not heal 
when opened. The attendant thought that the inflammation was 
caused by the chafing of a rope around the animal’s neck in the 
stall. 
The pus when received was grayish and oily looking, like 
freshly mixed paint, with faint streaks of red. It contained 
numerous, small, bright yellow particles the size of pin-heads and 
some small, gritty bodies of about the same size. Microscopic¬ 
ally, it was composed of leucocytes, a few red blood-cells and alsc 
crystals. The yellow particles proved not to be actinomyces. 
Cover glass preparations (ten in number) were examined without 
detecting tubercular bacilli. Some of the covers were left as 
long as eighteen hours in the stain. No other bacteria appeared 
to be present, 
