CERTIFIED MILK 217 



Veterinary Supervision of the Herd 



45. Tuberculin test. — The herd shall be free from tuberculosis, 

 as shown by the proper application of the tuberculin test. The 

 test shall be applied in accordance with the rules and regulations of 

 the United States Government, and all reactors shall be removed 

 immediately from the farm. 1 



46. No new animals shall be admitted to the herd without first 

 having passed a satisfactory tuberculin test, made in accordance with 

 the rules and regulations mentioned ; the tuberculin to be obtained 

 and applied only by the official veterinarian of the commission. 



47. Immediately following the application of the tuberculin test 

 to a herd for the purpose of eliminating tuberculous cattle, the cow 

 stable and exercising yards shall be disinfected by the veterinary 

 inspector in accordance with the rules and regulations of the United 

 States Government. 



48. A second tuberculin test shall follow each primary test after 

 an interval of six months,- and shall be applied in accordance with the 

 rules and regulations mentioned. Thereafter, tuberculin tests shall 

 be reapplied annually, but it is recommended that the retests be 

 applied semiannually. 



49. Identification of cows. — Each dairy cow in each of the certified 

 herds shall be labeled or tagged with a number or mark which will 

 permanently identify her. 



50. Herd-book record. — Each cow in the herd shall be registered 

 in a herd book, which register shall be accurately kept so that her 

 entrance and departure from the herd and her tuberculin testing can 

 be identified. 



51. A copy of this herd-book record shall be kept in the hands of 

 the veterinarian of the medical milk commission under which the 

 dairy farm is operating, and the veterinarian shall' be made responsible 

 for the accuracy of this record. 



52. Dates of tuberculin tests. — The dates of the annual tuberculin 

 tests shall be definitely arranged by the medical milk commission, 

 and all of the results of such tests shall be recorded by the veterinarian 

 and regularly reported to the secretary of the medical milk commission 

 issuing the certificate. 



53. The results of all tuberculin tests shall be kept on file by each 

 medical milk commission, and a copy of all such tests shall be made 

 available to the American Association of Medical Milk Commissions 

 for statistical purposes. 



1 See Circular of Instructions issued by the Bureau of Animal In- 

 dustry for making tuberculin tests and for disinfection of premises. 



