64 Dairy Bacteriology. 



in milk before or after its ingestion that result in the 

 formation of toxic products. 



Tuberculosis. This disease is by far the most impor- 

 tant bacterial malady that affects man and beast. In 

 man, it assumes a wide variety of phases, ranging from 

 consumption, tuberculosis of the lungs, which is by far 

 the most common type, to scrofulous glands in the 

 neck, cold abscesses, hip-joint, and bone diseases, as 

 well as affection of the bowels. These various mani- 

 festations are all produced by the inroads of the speci- 

 fic organism, Bacillus tuberculosis. The bovine, as well 

 as swine, fowls, and other warm-blooded animals, are 

 also affected with similar diseases. In man, the im- 

 portance of the malady is recognized when it appears 

 that fully one-seventh of the human race die of this 

 scourge. In cattle, the disease is equally wide-spread, 

 particularly in those countries where live stock has been 

 intensively developed. In the northern countries of 

 Europe, such as Denmark, Germany, England, France, 

 and the Netherlands, as well as in Canada, and this 

 country, this disease has been most widely dissemi- 

 nated. This has been occasioned, in large measure, 

 because of the exceedingly insidious nature of the dis- 

 ease in cattle, thereby permitting interchange of such 

 diseased stock without the disease being recognized. 

 Tuberculosis is found more abundantly in this country 

 in dairy than, in beef stock. Dairy cattle are, however, 

 not more susceptible, but the closer environment in 

 which milch cattle are kept, and the fact that there has 

 been greater activity in the matter of introducing im- 

 proved strains, accounts for the larger percentage of 

 affected animals. 



