BUREAU OP ANIMAL INDUSTRY. 



103 



the cattle dealers. A complete testing of all cattle in the District 

 during the past year resulted in only 0.84: per cent of reactions, as 

 compared with 18.87 per cent m the first year of the work. Tuber- 

 culin tests applied to cattle entering the District from the surround- 

 ing States disclosed 6.4 per cent of tuberculous animals which, if 

 they had been permitted to mingle with the healthy cattle of the 

 District, would have caused within a short time a return to a higher 

 percentage of tuberculosis. Cattle are kept in about 350 locations 

 within the District. 



Continuation of cooperation with Virginia farmers and the Vir- 

 ginia dairy and food division has shown an even greater reduction 

 in the percentage of tuberculosis among the cattle which are sub- 

 mitted to the tuberculin test for the first time, the percentage for the 

 past year being 6.3 as compared with 18.27 in 1910. 



In'the progress of this Avork in the past year, cooperation was ex- 

 tended to about 1.100 cattle owners and tests were applied to 20,101 

 cattle, of which 3.21 per cent reacted. The following table summa- 

 rizes the work: 



Results of cooperative tuhercnlin testing of cattle. 



Plans have been made for the work against animal tuberculosis to 

 be carried on under three projects, as follows: (1) Tuberculosis eradi- 

 cation among pure-bred herds of cattle; (2) tuberculosis eradication 

 among swine; (3) tuberculosis eradication in circumscribed areas. 

 Arrangements have been made with officials of a number of additional 

 States for cooperative work. 



LIVE-STOCK SANITARY WORK IN INTERSTATE COMMERCE. 



In the course of the inspection and quarantine service to prevent the 

 spread of animal diseases through interstate commerce, 2,071,498 in- 

 spections were made at market centers of cattle from the area quaran- 



