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BACTERIOLOGICAL SAMPLES OF MILK
Samples of designated milks were taken with the following
results :—
Satisfied Failed
Phosphatase Test 125 2
Methylene Blue Test 138 8
Turbidity Test 3 -
Ring Test 45 -
The tests 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 and
"Pasteurised" milks to indicate that the bacterial
content was within the prescribed standard.
Turbidity Test applied to "Sterilised Milk" to determine
that the milk was satisfactorily sterilised.
Ring Test applied to untreated milk to determine the
presence of "Brucellus abortus".
Where samples failed to satisfy the prescribed tests, investigations
were made and further samples taken, the results of which
proved satisfactory.
Bacteriological Samples of Ice Cream
55 samples were taken during the year with the following
results :—
Grade 1 46
Grade II 7
Grade III 2
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.
SUNDRY BACTERIOLOGICAL EXAMINATIONS
60 Empty milk bottles were sub- All were found satisfactory,
mitted at intervals during the
year to bacteriological examination
directly following their
treatment by the bottle washing
machine of a local milk bottling
plant.
6 Samples of Frozen Egg (3 of All were found satisfactory—no
whole frozen eggs and 3 of pathogenic organisms being
frozen egg white) were exam- isolated,
ined.