26 
BULLETIN 66. 
presented in Part 1 of this bulletin is very strong. On the 
other hand so great an authority as Dr. Robert Koch thinks 
he has proved that human and bovine tuberculosis are dif¬ 
ferent diseases. 
6 . In the state of our present knowledge of tuberculosis 
we can afford to take no chances by harboring infected ani¬ 
mals, both because of the danger to ourselves and of the 
loss among our stock. 
7. A cow may be seriously diseased so she will spread 
the infection to her calf or the rest of the herd and finally 
become unproductive and worthless herself without showing 
external signs of having a disease. The only known way of 
proving a cow healthy is by using the tuberculin test. 
8. There is evidence to show that calves may inherit 
tuberculosis from their mothers, but it is generally consid¬ 
ered that they are free from the disease when born and may 
be kept healthy by raising them on milk which is free from 
the bacilli. 
9. Where apparently healthy cows which respond to 
the test are kept for raising calves they should be isolated 
and every precaution taken to prevent the spread of the 
disease to the rest of the herd. We found the sexual organs 
badly diseased in three out of five cows examined and do 
not think it would be safe to use the herd bull with them. 
In the writer’s opinion the most profitable method is com¬ 
plete and conscientious destruction of diseased animals. 
10. Cow stables should be regularly cleansed and dis¬ 
infected. Good disinfectants are chloride of lime or a wash 
of equal parts carbolic acid and sulphuric acid mixed and 
diluted with twenty parts water. Sulphuric acid must be 
added slowly and carefully to the carbolic acid and these 
carefully to the water. 
