Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Bromley]
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BACTERIOLOGICAL SAMPLES OF MILK
Samples of designated milks were taken and submitted for examination with the following results:—
Satisfied | Failed | |
---|---|---|
Phosphatase Test | 71 | — |
Methylene Blue Test | 142 | 4 |
Ring Test | 88 | — |
VOID TESTS—11 i.e. Atmospheric (shade) temperature at
Laboratory prevented carrying out of Methylene Blue Test.
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 Test—Applied to "Untreated" Milk 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
83 samples were taken during the year with the following
results:—
Grade I — 56
Grade II — 24
Grade III — 3
Grade IV — —
Further samples were obtained from the suppliers whose
products had given Grade III results. These further samples were
found to be satisfactory and were classified as Grade I.