DISEASES COMMUNICABLE IN MILK 



31 



this country are the most valuable contributions to the subject and give 

 fairly clear insight into the question. Koch's dictum is proven to have 

 been based on insufficient evidence and is rejected. A summary of Park 

 and Krumwiede's observations together with their compilations from 

 literature of the work of other investigators including that of the English 

 and German Commissions appear in Tables 14 and 15. There was also 

 one case of double infection; generalized tuberculosis including meninges, 

 13 months; mesenteric nodes gave human type, and the meningeal fluid 

 the bovine type. Total 478 cases. 



TABLE 15. 1,033 CASES OF TUBERCULOSIS COLLECTED FROM LITERATURE BY PARK 



AND KRUMWIEDE 



Mixed or double infections, 10 cases. 



The two sets of cases together make a grand total of 1,511 cases and 

 show the following results: 



Adults 16 years and over, 940 human; 15 bovine; percentage bovine 1.5. 

 Children 5 to 16 years, 131 human; 46 bovine; percentage bovine 26.0. 

 Children under 5 years, 292 human; 76 bovine; percentage bovine 20.6. 

 Mixed or double infection, 11. 



These figures indicate that about a quarter of the cases of tuber- 

 culosis in children under 16 years of age is due to infection with the 

 bovine type of bacillus and that the number of cases of bovine origin 

 among adults is very small. 



The relation of tuberculosis of bovine origin to tuberculosis in general, 

 is hard to define. It is estimated that in the United States tuberculosis 

 is the cause of 9 per cent, of the deaths and in Germany 12 per cent. 



