12 
GEORGE H. BAILEY. 
high degree of general tuberculosis was 8o per cent. ; in a lot 
affected with only a moderate degree, 66 per cent. ; and a lot in 
which the disease was localized in the lungs, 33 per cent. Dr. 
Ernst says: ist, and emphatically, that the milk from cows af¬ 
fected with tuberculosis in any part of the body may contain 
the virus of the disease. 2d. That the virus is present whether 
there is disease of the udder or not. 3d. That there is no 
ground for the assertion that there must be a lesion of the udder 
before the milk can contain the infection of tuberculosis. 4th. 
That on the contrar}^ the bacilli of tuberculosis are present with 
no discoverable udder lesions. 
From 114 samples of milk from cows showing clinically no 
udder infection, 31.5 per cent, proved tuberculous by the micro¬ 
scope ; of 12 pigs fed with the same, 50 per cent, proved tuber¬ 
culous ; and of 23 calves fed with the same, 25 per cent, proved 
tuberculous. In response to Dr. Ernst’s inquiries addressed to 
physicians and veterinarians, the following answers were re¬ 
ceived from those who had observed or suspected the infection 
of the human family from tuberculous milk. From 1013 med¬ 
ical men he received replies : Positive, mother to child, 8 ; posi¬ 
tive, cow’s milk to child, ii ; suspicious, 16. The replies from 
veterinaries were much more conclusive. From 54 veterinaries 
he received replies: Positive cases, 14 ; suspicious 9. Dr. Ernst 
remarks, “The latter is startling in its percentage, until one re¬ 
members the greater facilities the veterinaries have for observ¬ 
ing such cases and their origin.” Dr. Gutmann, of Chicago, 
reports, “ In 38 specimens of milk inspected, in only one of 
them was it possible to demonstrate the presence of the tubercle 
bacillus microscopically, but in 38 injections of the same milk 
in animals, we had transmission by tuberculosis demonstrated 
six times.” 
Bollinger showed that a pure culture of tubercle bacilli gives 
positive results in inoculation experiments in a dilution of one 
to 400,000 ; thus showing that the milk may be infectious when 
the bacilli are so scanty as to be undiscoverable without an ex¬ 
tremely exhaustive examination. 
