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ICE CREAM
64 samples were submitted to the methylene blue test.
The methylene blue test does not provide a guarantee of safety but
it does serve as a simple and practical method of grading ice-cream according
to its degree of bacterial cleanliness and samples which consistently fail
to reach grades I or II give reasonable grounds to indicate defects in
nanufacture or handling requiring further investigation. The certifiete
giving the results of testing has the following note appended:
"Owing to the numerous factors governing the hygienic quality of icecream
it is unwise topay too much attention to the bacteriological results
of any single sample. Judgement should be based rather on a series of
samples. It is suggested over a six monthly period 50 per cent of vendors
samples should fall into grade I, 80 per cent into grades I or II, not
more than 20 per cent into grade III and none into grade IV".
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