TUBERCULOSIS, ITS CONTROL-AND ERADICATION. 
401 
detect the disease in the earlier stages. In fact, no positive diag¬ 
nosis can be made on physical examination except in the latter 
stages of the disease. 
Large numbers of cattle, that are sleek and fat, and appar¬ 
ently in the best of health, are found on slaughter to be affected 
with the disease in a generalized form, even to such an extent 
that it seems almost a miracle that the animal could live at all, 
let alone being fat and sleek of coat. 
If the lungs are affected, there may or may not be an accom¬ 
panying cough. There may or may not be an enlargement of 
the lymphatic glands lying near the surface of the body and ac¬ 
cessible to digital examination. All of the authorities who have 
written on this subject except those having written during the 
past three or four years, have given a long list of symptoms 
whereby the disease could be diagnosed ; such as, a dull short 
cough, which is more frequent after feeding, drinking or move¬ 
ment (as are most coughs affecting cattle) ; labored respiration ; 
loss of appetite ; loss of flesh ; paleness of the mucous mem¬ 
branes, staring rough coat; diminution of milk secretion ; de- 
bility v and, lastly, but by no means least, the surroundings and 
history of the case. But we should remember that the majority 
of these symptoms are not manifest until the disease has nearly 
run its course. 
As regards the control or eradication of tuberculosis in 
cattle, very little can be accomplished by relying upon physical 
diagnosis ; about all that can be done, by this method is to destroy 
the advanced cases a little sooner than nature would accomplish 
the same end. For these reasons very little progress was made 
until within the last decade. 
You all remember what a thrill of excitement spread over 
the entire civilized world when Dr. Koch announced that he had 
hopes to believe that he had discovered a cure for tuberculosis. 
With what eager expectancy many physicians secured some of 
the magic fluid, and how deep was their chagrin to find that a 
reaction, that is, an hyperthermic condition and other nervous 
phenomena, followed each injection in the tubercular patient. It 
