CERTIFIED MILK 501 



in accordance with the rules and regulations of the United States Govern- 

 ment, 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 in- 

 terval of six months, and shall be applied in accordance with the rules and 

 regulations mentioned. Thereafter, tuberculin tests shall be reapplied an- 

 nually, but it is recommended that the retests be applied semi-annually. 



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 de- 

 parture 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 vet- 

 erinarian of the medical milk commission under which the dairy farm is oper- 

 ating, 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 re- 

 ported 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. 



54. The proper designated officers of the American Association of Medical 

 Milk Commissions should receive copies of reports of all of the annual, semi- 

 annual, and other official tuberculin tests which are made and keep copies of 

 the same on file and compile them annually for the use of the association. 



55. Disposition of Cows Sick with Diseases Other than Tuberculosis. 

 Cows having rheumatism, leukorrhea, inflammation of the uterus, severe 

 diarrhea, or disease of the udder, or cows that from any other cause may be 

 a menace to the herd shall be removed from the herd and placed in a building 

 separate from that which may be used for the isolation of cows with tuber- 

 culosis, unless such building has been properly disinfected since it was last 

 used for this purpose. The milk from such cows shall not be used nor shall 

 the cows be restored to the herd until permission has been given by the 

 veterinary inspector after a careful physical examination. 



56. Notification of Veterinary Inspector. In the event of the occurrence 

 of any of the diseases just described between the visits of the veterinary in- 

 spector, or if at any time a number of cows become sick at one time in such 

 a way as to suggest the outbreak of a contagious disease or poisoning, it shall 

 be the duty of the dairyman to withdraw such sickened cattle from the herd, 

 to destroy their milk, and to notify the veterinary inspector by telegraph or 

 telephone immediately. 



57. Emaciated Cows. Cows that are emaciated from chronic diseases or 

 from any cause that in the opinion of the veterinary inspector may endanger 

 the quality of the milk, shall be removed from the herd. 



BACTERIOLOGIC STANDARDS 



58. Bacterial Counts. Certified milk shall contain less than 10,000 bac- 

 teria per cubic centimeter when delivered. In case a count exceeding 10,000 



1 See Circular of Instructions issued by the Bureau of Animal Industry for 

 making tuberculin tests and for disinfection of premises. 



