84 Dairy Bacteriology. 



The most important specific diseases that have been dis- 

 seminated through subsequent pollution of the milk are 

 typhoid fever, diphtheria, scarlet fever and cholera, but, of 

 course, the possibility exists that any disease germ capable 

 of living and thriving in milk may be spread in this way. 

 .In addition to these diseases that are caused by the intro- 

 duction of specific organisms (the causal organism of scar- 

 let fever has not yet been definitely determined), there are 

 a large number of more or less illy-defined troubles of an 

 intestinal character that occur especially in infants and 

 young children that are undoubtedly attributable to the 

 activity of microorganisms that gain access to milk during 

 and subsequent to the milking, and which produce changes 

 in milk before or after its ingestion that result in the 

 formation of toxic products. 



DISEASES TRANSMISSIBLE FROM ANIMAL TO MAN THROUGH 

 DISEASED MILK. 



Tuberculosis. In view of the wide-spread distribution 

 of this disease in both the human and the bovine race, the 

 relation of the same to milk supplies is a question of great 

 importance. It is now generally admitted that the differ- 

 "ent types of tubercular disease found in different kinds of 

 animals and man are attributable to the development of 

 the same organism, Bacillus tuberculosis, although there 

 are varieties of this organism found in different species of 

 animals that are sufficiently distinct to permit of recogni- 

 tion. 



The question of prime importance is, whether the bovine 

 type is transmissible to the human or not. Artificial in- 

 oculation of cattle with tuberculous human sputum as well 

 as pure cultures of this variety show that the human type 



