BACTERIA IN THE INDUSTRIES 1 95 



mum : if raw, it shall consist of the clean raw milk from healthy cows as 

 determined by physical examination and by the tuberculin test by a quali- 

 fied veterinarian under the supervision of the inspecting department, and 

 from dairies that score not less than seventy per cent, on the score card - 

 adopted by the United States bureau of animal industry, department of 

 agriculture. The tuberculin test must be repeated annually if no reacting 

 animals are found in the herd. If reacting animals are found they must 

 be removed from the herd, and the tuberculin test repeated in six months. 

 All cows are to be fed, watered, housed and milked under conditions ap- 

 proved by the inspecting department. All persons who come in contact 

 with the milk must exercise scrupulous cleanliness and must not harbor 

 the germs of typhoid fever, tuberculosis, diphtheria, or other infectious 

 diseases liable to be conveyed by milk. Absence of such infections shall 

 be determined by cultures and physical examination, to the satisfaction 

 of the inspecting department. 



This milk is to be delivered in sterile containers and is to be kept at a 

 temperature established by the inspecting department until it reaches 

 the ultimate consumer, when it must contain less than one hundred thou- 

 sand bacteria per cubic centimeter. If pasteurized it shall come from cows 

 free from disease as determined by physical examination at least once in 

 six months, by a qualified veterinarian of an inspecting department. It 

 shall contain less than two hundred thousand bacteria per cubic centimeter 

 before pasteurization and less than ten thousand bacteria per cubic centi- 

 meter at the time of delivery to the ultimate consumer. Dairies from 

 which this milk is derived must score at least sixty on the score card 

 adopted by the United States Bureau of animal industry, department 

 of agriculture. 



7. Grade " B" Milk. No person, firm or corporation shall sell or 

 exchange, or offer or expose for sale or exchange, as and for grade B milk, 

 any milk that does not conform to the following requirements as a mini- 

 mum: it must be obtained from cows in no way unfit for the production of 

 milk for use by man, as determined by physical examination at least once 

 in six months by a qualified veterinarian of an inspecting department. 

 Before pasteurization such milk shall contain less than one million bac- 

 teria per cubic centimeter. After pasteurization it shall contain less than 

 fifty thousand bacteria per cubic centimeter. 



Milk for pasteurization must be kept at a temperature established by 

 the inspecting department up to the time of delivery to the pasteurization 

 plant and rapidly cooled after pasteurization to a temperature of fifty 

 degrees Fahrenheit, or below, and so maintained to the time of delivery 

 of the same. Pasteurization shall be by the holding method at a tem- 

 perature not less than one hundred forty degrees Fahrenheit; provided, 



