205 



almost, one-lialf of the cases of tuberculosis in cattle are 

 found in cows. This is due to the fact that the cow comes 

 in closer contact with man and has less freedom, less pure 

 air and receives more infected food than calves or oxen. 



In the Copenhagen slaughter houses from 1891 to 1893 

 inclusive, the following records were made : 



Inspected 132,294 oxen and cows, 23,305 or 17.7 % were tuberculous. 

 8,292 swine, 1,272 or 15.3 % 



185,765 calves, 369 or 0.?% *' 



337,014 sheep, lor 1.0003%" 



At the Berlin public slaughter house during 1892, the 

 following records were made : 



Inspected 142,874 oxen and cows, 21,603 or 15.1 % were tuberculous. 

 518,073 swine, 7,055 or 1.55% " 



108,348 calves, 125 or 0.11% " " 



355,949 sheep, 15 or 0.004%-' " 



In America. — The extent of tuberculosis in the United 

 States is not definitely known. So far only one State has 

 commenced a systematic attempt at eradicating bovine tu- 

 berculosis. Massachusetts is now working upon a large 

 scale and during the present year has tested over 25,000 

 cattle for tuberculosis. In this work the diagnostic agent 

 has been Tuberculin. 



Outside of Massachusetts the tests for tuberculosis have 

 been confined to local herds. In New York State, Law has 

 found some herds with 98 per cent, of the animals tubercu- 

 lous; while in other herds he found only 5 per cent, tuber- 

 culous. To be sure some dairy herds in country districts 

 were found entirely free from tubuculosis. 



Reports of tests in Minnesota, Wisconsin, Illinois and 

 Iowa show that many of the herds in the favored country 

 regions of the north-west are infected. In fact, so far as 

 tuberculin tests have been made in every part of the 

 United States no state has been found entirely free of this 

 bovine pest. However, there is no doubt that the older and 

 more densely populated states and cities are more exten- 

 sively and seriously infected. A few testa have been made 



