BURlfAU OF ANIMAL INDUSTEY. 



Ill 



TUBERCULOSIS-FREE ACCREDITED HERDS OF CATTLE. 



A good beginning has been made in the estabhshraent of a list of 

 herds of pure-bred cattle ofRciaUy accredited as being free from 

 tuberculosis. A statement of methods and rules was adopted by the 

 United States Live Stock Sanitary Association and by representatives 

 of pure-bred cattle breeders' associations in December, 1917, and was 

 approved by the Chief of the Bureau of Animal Industry. The plan, 

 in brief, is to test the cattle with tuberculin at the request of the 

 owner, to eliminate any reacting animals either by slaughter or by 

 following prescribed sanitary measures, to repeat the test at pre- 

 scribed intervals, and to list as tuberculosis-free accredited herds 

 all herds entitled to that distinction. Official certificates are issued to 

 the owners of such herds. A list of accredited herds and of herds that 

 had successfully passed one test with a view to certification, compris- 

 ing herds tested up to the end of the fiscal year, has been printed 

 and a summary is given in the following table. An "accredited" 

 herd is one that has successfully passed two annual or three semi- 

 annual tests. The herds "tested once without reactors" must pass 

 subsequent tests before being accredited and certified. The work 

 shown in the following table forms a part of that composing the pre- 

 ceding table. 



Summary of herds of cattle officially accredited as free from tuberculosis and of herds that 

 have passed one test with a view to later certification. 



LIVE-STOCK SANITARY WORK IN INTERSTATE COMMERCE. 



In the course of the inspection and c^uarantine service to prevent 

 the spread of animal diseases tlirough interstate commerce there were 

 inspected at market centers 20,987,998 cattle, of which 52,092 were 

 dipped under bureau supervision in order that they might continue in 

 interstate transit. Sheep to the number of 17,019,386 were inspected 

 at stockyard centers for scabies and other contagious diseases, and 

 651,339 were dipped under bureau supervision in order that they 

 might be disposed of for purposes other than immediate slaughter. 



