48 PRINCIPLES AND PRACTICE OF MILK HYGIENE 
medical inspection of a qualified physician, under sanitary con- 
ditions such that the bacterial count shall not exceed 100,000 
per cubic centimetre at the time of delivery to the consumer. It 
is recommended that dairies from which this supply is obtained 
shall score at least 80 on the United States Bureau of Animal 
Industry score card. 
Pasteurized Milk.—Milk of this class shall come from cows 
free from disease as determined by physical examinations by a 
qualified veterinarian and shall be produced and handled under 
sanitary conditions such that the bacterial count at no time ex- 
ceeds 200,000 per cubic centimetre. All milk of this class shall 
be pasteurized under official supervision, and the bacterial count 
shall not exceed 10,000 per cubic centimetre at the time of 
delivery to the consumer. It is recommended that dairies from 
which this supply is obtained shall score at least 65 on the 
United States Bureau of Animal Industry score card. 
The above represents only the minimum standards under 
which milk may be classified in Grade A. The commission recog- 
nizes, however, that there are grades of milk which are produced 
under unusually good conditions, in especially sanitary dairies, 
many of which are operated under the supervision of medical 
associations. Such milks clearly stand at the head of this grade. 
GRADE B 
Milk of this class shall come from cows free from disease 
as determined by physical examinations, of which one each year 
shall be by a qualified veterinarian, and shall be produced and 
handled under sanitary conditions such that the bacterial count 
at no time exceeds 1,000,000 per cubic centimetre. All milk of 
this class shall be pasteurized under official supervision, and the 
bacterial count shall not exceed 50,000 per cubic centimetre 
when delivered to the consumer. 
It is recommended that dairies producing Grade B milk 
should be scored and that the health departments or the con- 
trolling departments, whatever they may be, strive to bring 
these scores up as rapidly as possible. 
