MEDICAL MILK COMMISSIONS AND CERTIFIED MILK. 29 
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 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 veteri- 
narian 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. 
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, leucorrhea, inflammation of the uterus, severe diarrhea, of 
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 tuberculosis, 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 inspector, 
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 imme- 
diately. 
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. 
BACTERIOLOGICAL STANDARDS. 
58. Bacterial counts. — Certified milk shall contain less than 10,000 bacteria 
per cubic centimeter when delivered. In case a count exceeding 10,000 bacteria 
per cubic centimeter is found, daily counts shall be made, and if normal counts 
are not restored within 10 days the certificate shall be suspended. 
59. Bacterial counts shall be made at least once a week. 
60. Collection of samples. — The samples to be examined shall be obtained 
from milk as offered for sale and shall be taken by a representative of the milk 
commission. The samples shall be received in the original packages, in prop- 
