TRANSMISSION OF TUBERCULOSIS THROUGH MEAT AND MILK. 633 
McFadyean 4 3 says : “ In a considerable proportion of cases 
there was a distinct history of the animal’s having been fed with 
tuberculous milk. Now when one reflects that certainly not 
one horse in several hundreds is at any period of its life fed on 
cow’s milk, the frequency with which tuberculosis has been 
met with in horses that had been so fed becomes very striking.” 
The foregoing states briefly most of what has been carefully 
done and recorded by way of experimentation and observation 
to prove that tuberculosis is communicable to other animals 
through the medium of the milk and the food tissues and or¬ 
gans of tuberculous neat cattle. In addition there might be 
added other observations of less definite shape, but no less true 
and convincing, as, for example, the great lessening of tubercu¬ 
losis among calves of tuberculous dams which are separated at 
birth and fed on sterilized milk or the milk of sound cows, as 
has been so abundantly shown by Bang in the prosecution of 
his suppressive measures in Denmark. Reference might also 
be made to numerous observations of veterinarians pointing to 
the transmission of tuberculosis from tuberculous cows through 
their milk to calves and swine. Enough has been done to prove 
beyond the peradventure of a doubt that tuberculosis may be 
transmitted through the milk and the food structures of tuber¬ 
culous animals to the animals that consume these products or 
are inoculated with them. Upon this all students of the subject 
agree. This much has been proven. But these facts do not 
decide the important question at issue, viz. : whether or not 
tuberculosis is transmissible from animal to man, nor would 
they if they were multiplied ad infinitum. They only furnish 
a basis from which we may reason. For this purpose they are 
invaluable, as they establish the premise that the meat and milk 
af animals do at times contain living, virulent tubercle bacilli, 
-apable of producing disease in other animals. 
ii .—transmission to man. 
A. By Meat, 
i. By Artificial Methods. 
There is no evidence of any sort on this point. 
