DIAGNOSIS AND PREVENTION OF TUBERCULOSIS. 
455 
any that are tuberculous, it is indispensable as a diagnostic 
agent. When tuberculin is properly prepared, it will not injure 
a healthy animal. That it will aggravate tuberculosis already 
in existence, is an established fact, and for this reason it has 
demonstrated its value as a test. Knowing this, it should never 
be used unless the owner or the government intend to make 
thorough the work of eradicating the diseased animals. 
Tuberculosis has been described as a universal panzotic, and 
from the deaths in the human subject of this disease, it can 
well be termed pandemic. This being evident, prevention is 
certainly the most rational method of making any inroad into 
its prevalence. 
Fleming, in his Sanitary Science and Police , published in 1875, 
under the heading of “Prevention,” says: “The only prevent¬ 
ive measures with which we are acquainted are those of a hygi¬ 
enic kind: proper food and water, sufficient exercise in the open 
air, clean, dry and well ventilated, but not too cold stables, and 
keeping the cattle from undue exposure to severe weather. As 
there is reason to believe that the malady is hereditary, cattle 
having tendency to it should not be bred from. 
As the experiments which have been conducted by most 
competent authorities have demonstrated that tuberculosis can 
be induced in animals by feeding them with tubercular matter, 
care must be taken that this is not given to them as food. There 
being much reason to believe that the disease can be transmitted 
by co-habitation, whenever cattle show any tendency to it, they 
should be isolated from the healthy, and every precaution ob¬ 
served with regard to preventing contact. Animals slightly 
affected should be fattened and slaughtered, and their flesh, if 
free from traces of the disease, may be utilized. The milk of 
such animals should be proscribed, and in advance cases, the 
flesh also.” 
It is readily seen from this quotation that the requirements 
for protection against the disease, either in man or animals, are 
the same. It can be concisely stated in the word hygiene. I 
doubt if any one will take exception to the statement that sun- 
