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(42)
Four of the 153 samples of milk taken for chemical analysis were
reported to contain added water (see page 41) whilst two samples of
pasteurised milk taken in course of delivery to a local hospital and two
taken at L.C.C. schools failed to satisfy the Phosphatase test for efficient
heat-treating.
Sterilised Milk:
The Turbidity Test is prescribed for sterilised milk, the presence
of any signs of turbidity;, indicating that the milk has not been treated to
sterilisation temperature.
Bacteriological Examination of Milks
During the year under review, two-hundred and eight samples of
milk were purchased by the Sampling Officer for bacteriological examination,
one-hundred and forty-five being purchased from milk roundsmen in the
streets during the early morning delivery, seventy-two in the course of
delivery to hospitals, and forty-two at London County Council schools etc.
in the Borough.
The following are details of the samples taken;
Tuberculin tested milk (Farm Bottled) 6
Tuberculin tested, milk (Pasteurised) 20
Pasteurised milk 168
Sterilised milk 14
Total 208
Satisfactory reports were received with the exception of seven
samples of pasteurised milk which failed to satisfy the Phosphatase test
for efficient heat-treatment.
Four samples of tuberculin tested (Farm Bottled) milk, one of
tuberculin tested, milk (pasteurised) and one of pasteurised milk were
specially examined for the presence of tubercle bacilli with negative
results.
During 1950 the following licences to sell designated milks were
granted by the Borough Councilj-
No„ of licences to sell Tuberculin Tested Milk 35
No. of Supplementary licences to sell Tuberculin
Tested Milk 9