TUBERCULIN TESTS OF THE COLLEGE HERD. 
25 
along with lining of lungs and heart, were covered with surface tubercles. 
The lungs were very much affected, the left one being almost entirely 111 led 
with tubercles and calcareous deposits. Those who saw this dissection ex¬ 
pressed surprise that the cow could be so generally diseased and continue to 
live, while in reality she had evidenced little outward sign of trouble. Pho¬ 
tographs taken of spleen, glands and uterus. Carcass burned. 
REACTING ANIMALS NOT ALL DESTROYED. 
It may be well to explain why all reacting animals were 
not destroyed at once. Some of them were kept for several 
reasons. In the first place it is a matter of some interest to 
determine whether tuberculous animals from the East will 
be cured of the disease by open air treatment when brought 
West. Second, it is considered possible to raise healthy 
calves from cows which are not badly affected, by separating 
them from the mother at once and putting them on nurse 
cows which are free from disease. Third, the cows will be 
useful clinical material for the instruction of students in vet¬ 
erinary science. The reacting animals are being kept away 
from healthy ones and as soon as our barn is remodeled 
and thoroughly disinfected we hope never to put a tubercu¬ 
lous animal in it. With every precaution against spreading 
infection the cattle will be handled for a time for experi¬ 
mental purposes. At the same time we will speed the day 
when we can say that our stock is free from disease and that 
there is no hereditary tuberculosis or tendency to it in any 
cattle at the College. 
CONCLUSIONS AND RECOMMENDATIONS. 
1. While there is probably less disease in Colorado 
than among cattle from humid states, the disease is present 
in cur herds and should receive attention. 
2. Stockmen, especially dairymen and owners of family 
cows should get rid of the disease and not introduce more 
of it by the purchase of infected animals. 
3. The tuberculin test is a reliable way of finding out 
whether cows are free from tuberculosis. 
4. People should secure sanitary milk and disease-free 
butter, especially where children consume them. Milk or 
cream not from tested cows should be boiled before using. 
In ordinary practice any heat less than boiling should not be 
considered sufficient to kill the germs. 
5. We do not know whether tuberculosis is commonly 
transmitted from cattle to man. The evidence that it is, as 
