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Biological Samples.
Twelve samples of raw milk were taken from the three farms in the
district before it was treated in any way. All were reported to be free from
tubercle infection as a result of animal inoculation tests.
Milk and Dairies Regulations, 1949—Regulation 20.
No action was called for under this section which empowers the
Medical Officer of Health to deal with milk which he has reason to believe
might be a source of infection to man.
Qualitative Analysis.
The Public Analyst examined 203 samples of milk and of these 41
were samples of Channel Islands milk. All the latter were satisfactory. Of
the remaining 162 samples 8 were found not to comply with the statutory
standard of 3 % fat and 8.5 % non fatty solids.
The average content of the 41 samples of Channel Islands milk was—
fat 4.45%—non fatty solids 8.96%. Such milk is required to have a minimum
of 4% fat for purposes of the milk (Control and Maximum Prices)
Order by reason of which the producers receive a premium.
The average quality of the other milk samples was—fat 3.64%—non
fatty solids 8.69%.
Ice Cream
For purposes of assessing the bacterial cleanliness of ice cream, samples
are classified into four grades. The grade is determined by the length of
time the sample takes to reduce the colour of the dye methylene blue. This
time is in inverse proportion to the number of bacteria present, i.e. the more