INSPECTION OF MEAT AND MILK. 
83 
the quarantine limits around Baltimore, upon which a care¬ 
ful autopsy can be held, tuberculosis is sometimes seen con¬ 
fined to organs other than the lungs, so that the percentage 
should really be higher. 
The percentage of tuberculous cattle in which the tubercle 
bacillus has been demonstrated in the milk, is, according to 
Bollinger, as follows: 
In a lot of cows affected with extensive tuberculosis, 80 
per cent, showed infection of the milk. In a lot with mod¬ 
erate tuberculosis, 66 per cent, showed infection of the milk. 
In a lot with slight tuberculosis, 33 percent, showed infection 
of the milk. Drs. Ernst and Peters, in some valuable experi¬ 
ments made at the experimental farm near Boston, fed 13 
calves and 7 pigs, healthy at the beginning of the experiment, 
on the milk of 18 tuberculous cows, taken from ten different 
herds, representing eight towns, all within a radius of twenty- 
five miles from Boston, except in one instance where a cow came 
from Newport, R. I. The feeding was continued for a period 
of from three to six months. At the end of this time they 
were killed and the post-mortem examination showed that six 
of the calves and two of the pigs were tuberculous. Nine of 
the eighteen cows were killed, and the diagnosis verified by 
post-mortem examination. Tubercle bacilli were found in the 
milk of six of these cows. These experimenters have proven 
that the milk of tuberculous cows may convey infection when 
the udder is free from any tuberculous disease. Dr. Peters 
informs me by letter that he has visited several herds in the 
State of Massachusetts, and found the disease in from 1 to 100 
per cent, of the animals. The same gentleman has published 
a report of a case which came under his observation, where a 
pet dog became affected from eating the sputum of its tuber¬ 
culous mistress. 
Prof. Peuch publishes an interesting note* on the conta¬ 
gion of tuberculosis. His experiments are as follows: 
“ I. By the unboiled milk. (1). A pig two months old was 
fed for a period of five days with the milk of a cow affected 
*Revue Veterinaire, December, 1888. 
