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36 REPORT OF THE MEDICAL OFFICER OF HEALTH FOR 1955
Milk
Of the 326 samples of milk, 144 were submitted to the phosphatase
test, 159 to the methylene-blue test, and 23 to the turbidity test. In
two cases the atmospheric shade temperature exceeded 65°F., making
the methylene-blue test void.
In addition 15 samples of raw milk were examined for the presence
of Mycobacterium tuberculosis and Brucella abortus. In each case
negative results were obtained.
Fresh Cream
Five samples of fresh cream were examined for the presence of
pathogenic organisms. They were all reported sterile.
Imitation Cream
Twenty-one samples were examined for the presence of pathogenic
organisms. All were reported free of contamination, with the
exception of one, which had a high bacterial count. Further samples
have since proved satisfactory.
Artesian Well Water
Eight samples were submitted for examination, and were reported
satisfactory.
Ice-cream
During the year 47 samples of ice-cream were tested in accordance
with the technique suggested by the Ministry of Health and Public
Health Laboratory Service. These samples were examined at the
Public Health Laboratory.