BOVINE TUBERCULOSIS. 
191 
j_ 
by the Society, a number of carefully prepared tables are given, 
showing the results of the investigations and inoculations. 
We find that the cows, from which the milk used in these 
experiments was taken, were picked out by physical examina¬ 
tion alone. 
The udders may not have been diseased, but yet the cows 
themselves were badly diseased, as shown by post-mortem 
examination. 
In all 36 different cows were experimented with, and the 
bacillus of tuberculosis was found in the milk of 12 different 
animals. 
Experiments were made by inoculating 88 guinea pigs with 
milk from 15 of these tuberculous cows. The milk from only 
six was f ound capable of producing the disease, and only 12 of 
these 88 guinea pigs became infected. 
In another series of experiments, 90 rabbits were inoculated 
with milk from 19 different tuberculous cows. The milk of only 
four of the cows produced the disease, and only six of the 90 
rabbits became infected. 
Again, 48 rabbits were fed with milk from five tuberculous 
cows, and with milk known to be infected, and only two rabbits 
became diseased ; both of these rabbits were fed on milk from 
the same cow (cow E), which was very badly diseased. 
Twelve healthy pigs fed on milk from these same cows gave 
a larger proportion of cases, five out of the 12 becoming tuber¬ 
culous ; but it should be noticed that three of the five were fed 
on milk from one cow (cow E). Further, it was milk from this 
same cow that infected the rabbits in the last series of experi¬ 
ments referred to. 
Twenty-one calves were also fed with milk from these cows, 
and eight became tuberculous. (Infectiousness of Milk. Ernst.) 
Experiments in this same line have been done by many 
other investigators, notably by Bang of Copenhagen. He 
experimented with milk from 28 tuberculous cows, and in only 
two cases did the milk prove to be infected, yet the cows were 
almost all “infected with tuberculosis to a high degree.” 
