207 



By physical and post mortem examination the writer 

 has found tuberculosis in three dairy herds in Alabama. 



It is hoped that within another year the writer may have 

 many records of tests, made with tuberculin, that will give 

 more definite and extensive knowledge concerning the pre- 

 valence of bovine tuberculosis in Alabama. 



HUMAN AND BOVINE TUBERCULOSIS CAUSED BY THE SAME 



GERM. 



The tubercle bacilli found in man are identical in all re- 

 spects with those that are found in cattle and all other ani- 

 mals with one possible exception — the chicken. At present 

 it is questionable whether tuberculosis in man is identical 

 with tuberculosis in chickens. Koch has found considera- 

 ble variation in the bacilli from the two different sources. 

 Any of the domestic animals except fowls, when inoculated 

 with living tubercle bacilli from man contract tuberculosis 

 Dogs and cats have become tuberculous by eating the 

 sputa from tuberculous persons. Guinea pigs when forced 

 to inhale air ladened with fine particles of dried tuberculous 

 sputa, or when inoculated with the same material become 

 tuberculous. 



Numerous instances are recorded where tuberculous ma- 

 terial from cattle has infected other animals. 



Pearson, Bollinger, Ernst, Peters, Schroeder and others 

 have produced tuberculosis in guinea pigs, by feeding them 

 milk from tuberculous cows. 



At the Experiment Station in Vermont a number of the 

 dairy cows were found by the tuberculin test to have tuber- 

 culosis. A litter of five pigs, from healthy parents, had 

 been fed milk from this dairy herd. The five pigs at the 

 time of slaughter were found tuberculous. In every in- 

 stance where pigs have been fed, any length of time, upon 

 milk containing tubercle bacilli, they have contracted tuber- 

 culosis. 



Since the discovery [of the^bacillus tuberculosis, the 

 transmissibility^^or the~contagious and infectious character 



