MILK DANGERS AND REMEDIES 135 



multiply with particular facility in milk, even more 

 so than in ordinary broth cultures ; that they have 

 been found in air in a vital and virulent condition, 

 and may be scattered far and wide attached to dust 

 particles ; and if we remember the numerous oppor- 

 tunities offered for the infection of milk by persons 

 handling it, who either themselves are suffering 

 from this disease or are in diphtheria surroundings 

 then indeed we can readily understand how milk 

 becomes a diphtheria-carrier of the first order. 



Tuberculosis in cattle, and how this disease may 

 affect the character of dairy produce, is, as already 

 pointed out, a subject which is attracting the atten- 

 tion of a large number of investigators. 



The general public is perhaps hardly aware of 

 how widespread this disease is amongst cattle, and 

 it is only of late years that very careful inquiries 

 have elicited the fact that it is not only very 

 extensively distributed, but may be present in 

 animals to all outward appearance in perfect 

 health. 



In Germany it was asserted a few years ago that 

 every fifth cow was tuberculous, and even this was 

 regarded as a moderate estimate. The distin- 

 guished Danish pathologist, Professor Bang, is 

 responsible for the announcement that during the 

 years 1891-3 177 per cent, of the animals 

 slaughtered in Copenhagen were infected with 



