INFECTIOUS DISEASES OF CATTLE. 



417 



In justice to Shorthorn cattle it should be said in this connection 

 that they are probably no more susceptible to tuberculosis than are 

 other breeds, but the disease has been allowed t-o spread in certain 

 herds and families to such an extent as to give a wrong impression 

 concerning the breed as a whole. 



Tlie slaughterhouse statistics of Prussia show 14.6 per cent of the 

 cattle and 2.14 per cent of the hogs to be tuberculous. In Saxony 

 the percentage is 29.13 with cattle and 3.10 with hogs. In the city 

 of Leipzig the figures are 36.4 for cattle and 2.17 for hogs. (Siedam- 

 grotzky.) Of 20.850 animals in Belgium tested with tuberculin in 

 1896, 48.88 per cent reacted. (Stubbe.) Of 25,439 tested in Den- 

 mark from 1893 to 1895, 49.3 per cent reacted; and of 67,263 tested 

 from 1896 to 1898, 32.8 per cent reacted. (Bang.) 



Figures available in the United States do not cover a sufficient area 

 of our territory to allow us to make a reliable estimate of the extent 

 of tuberculosis with milch cows. There is little doubt, however, but 

 that the disease has been increasing both with dairy cattle and hogs. 

 From a review by Russell and Hastings, of the Wisconsin Agricul- 

 tural Experiment Station, of tests of cattle for tuberculosis which 

 have been made in the United States, the following summary is 

 presented : 



Statistics of tests for tuberculosis in the Unitrd States. 



Number 

 tested. 



Number 

 tubercu- 

 lous. 



Vermont 



Massachusetts 



Massachusetts, entire herds. 



Connecticut 



New York, 1894 



New York, 1897-98 



Pennsylvania 



New Jersey 



lUinois, 1897-98 



Illinois, 1899 



Michigan 



Minnesota 



Wisconsin: 



Experiment Station tests- 

 Suspected herds 



Nonsuspected herds 



State veterinarian's tests— 



Susj>ected herds 



Tests of local veterinarians under State veterinarian, cattle in- 

 tended for shipment to States requiring tuburculincertificate. 



60,000 

 24,685 



4,093 



6,300 

 947 



1,200 

 34,000 



2,500 

 929 



3,655 



3,430 

 873 



2,390 

 12,443 

 1,080 



66 



1&3 



4, SCO 



Per cent 



tubc^cu- 



ious. 



3.9 

 50.0 

 26.4 

 14.2 



6.9 

 18.4 

 14.1 

 21.4 

 12.0 

 15.32 

 13.0 

 11.1 

 13.8 



35.6 

 9.0 



32.5 

 2.2 



16923° 



