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97
Bacteriological and other Examinations (Continued)
Gelatine 2
Cream, double 1
Cream, single 1
*Ham and Lettuce sandwich 1
Whole milk powder 2
Skimmed milk powder 9
Egg yolk 1
Crab meat 1
Whole dried egg 17
Packing gland 1
Egg white solid spray 3
Dessicated coconut 3
Milk 6
Samples of milk were submitted to the Public Health Laboratory
for examination under the Milk (Special Designations) Regulations,
as fol1ows :-
Methylene Blue Tests 189 (of which 16 were void, the
atmospheric shade temperature being over 65°F)
Phosphatase Tests 186
All samples were satisfactory.
The 206 samples of ice-cream and ice-cream mix were submitted
to the Methylene Blue Test, approximately 40% more than in
1958, This was partly because of the warmer summer and partly
because some of the samples (25 in all) fell into grades 3 and 4.
Investigations into the causes of these apparently less
satisfactory results (nearly all from one manufacturer) necessarily
increased the degree of supervision of the operation and cleaning
of the plant involved, including the number and types of samples
taken. The co operation of the Director of the Public Health
Laboratory service the County Hall Laboratory was enlisted
and Plate counts and examinations for coliform and heat resistant
organisms were undertaken. Icecream mix at various stages of
production, raw material ingredients and a part of the plant as