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During the year one hundred and twelve samples were taken and upon examination
were graded as follows:
Grade 1 — 53
Grade 2-25 Satisfactory
Grade 3 — 31
Gride 4 — 3 Unsatisfactory.
There is no prescribed statutory bacteriological standard for ice-cream as it is
considered that no available bacteriological test is precise enough to be made statutory.
The test applied, however, although only a provisional measurement of the bacterial
activity in ice-cream, is a simple and valuable means for the routine grading of the
product. By regulation ice-cream has to be pasteurised and, although certain organisms
which are resistant to pasteurisation may be present in the ingredients of the ice-cream
mix, they are seldom responsible for repeated results at Grades 3 and 4 levels. Failures
are normally attributable to inadequate and unsatisfactory sterilisation of plant, equipment
and servers. Sampling is concentrated on those premises where ice-cream is
manufactured, and cafes and restaurants where ice-cream is served from a bulk supply.
In the event of samples falling in Grades 3 and 4 investigations are carried out to
ensure that efficient sterilisation is practised as a means of preventing contamination
of the product after pasteurisation.
(6) Other Foods.
Samples of other foods for examination are selected from those recognised as
suitable media for the development of organisms. Such foods include cooked meats,
fish products and milk products. Thirty nine samples of these types of foods were
examined and all were reported upon as being satisfactory with the exception of two
samples of whipping cream. An investigation was carried out and subsequent samples
proved satisfactory.
(7) Food Hygiene Codes of Practice.
Hygiene in the Bakery Trade and Industry.
This Code of Practice was published by the Ministry of Health in conjunction
with the Ministry of Agriculture, Fisheries and Fo0d. The purpose of the publication
was to give advice and guidance to persons in the trade who are responsible for compliance
with the Food Hygiene Regulations. Copies of the Code of Practice were
issued to the proprietors of twenty five bakehouses in the Borough.
(8) The Liquid Egg (Pasteurisation) Regulations, 1963.
There are no egg pasteurisation plants in the district and the three samples of
liquid egg taken were submitted only for bacteriological examination and not to the
Alpha-Amylase test.
3. ATMOSPHERIC POLLUTION
(a) The programme of establishing Smoke Control Areas continues to make
satisfactory progress and by the end of the year over half the Borough was governed
by Smoke Control Orders, covering an area of 7,282 acres including 38,559 premises.
During the year, the following Smoke Control Orders became operative:
Acreage. No. of Dwellings. No. of other Premises.
Barnes No. 7 Order 453 1,288 89
Richmond No. 7 Order 152 1,330 41
Twickenham No. 5 Order 630 3,077 156
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