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87
BACTERIOLOGICAL SAMPLES OF MILK
Samples of designated milks were taken and submitted for
examination with the following results—
Satisfied Failed
Phosphatase Test 158 —
Methylene Blue Test 172 6
Ring Test 60 —
The tests shown in the above table were applied for the following
purposes:—
Phosphatase Tests—Applied to "Pasteurised" Milk to
determine that the milk was satisfactorily pasteurised.
Methylene Blue Tests—Applied to "Untreated" and
"Pasteurised" milks to indicate that the bacterial
content was within the prescribed standard.
Ring Test—Applied to untreated milk to determine the
presence of "Brucellus abortus".
Where samples failed to satisfy the prescribed tests investigations
were undertaken and further samples obtained, the tests of
which proved to be satisfactory.
BACTERIOLOGICAL SAMPLES OF ICE CREAM
102 samples were taken during the year with the following
results:—
Grade I — 70
Grade II — 18
Grade III — 6
Grade IV — 1
Further samples were obtained from the suppliers whose
products had given Grade III and IV results. These further
samples were found to be satisfactory and were classified as
Grade I.