London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Hammersmith 1959
[Report of the Medical Officer of Health for Hammersmith Borough]
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isolated; the results of the examinations are shown below:—
| Sample No. | Sample | Plate Count No. of Colonies | Bact. Coli No. of Colonies |
|---|---|---|---|
| Broiler Chicken | |||
| 62 | Cooked | More than 560,000 | More than 560,000 |
| 63 | Uncooked | More than 140,000 | Less than 5,000 |
| 64 | Cooked | More than 28,000 | Less than 5,000 |
| 65 | Cooked | More than 140,000 | Less than 5,000 |
| 66 | Uncooked | More than 98,000 | Less than 5,000 |
| 67 | Cooked | Less than 5,000 | Less than 5,000 |
| 68 | Cooked | Less than 5,000 | Less than 5,000 |
| 69 | Uncooked | More than 400,000 | Less than 100,000 |
| 77 | Uncooked | More than 6,000,000 | Less than 6,000 |
| 76 | Cooked | Less than 5,000 | Less than 5,000 |
Ice Cream.
Regular inspection of premises used for the sale, storage and
manufacture of ice-cream has been made and particular attention
was given by the Food and Drugs Inspector where manufacture
takes place. There are three such premises registered in the
borough where ice-cream is manufactured, two of which are wholesalers.
During the year 46 samples of ice-cream were taken and submitted
to the Public Health Laboratory Service and the Royal
Institute of Public Health and Hygiene for bacteriological examination
and the methylene blue test. This test is recommended by the
Ministry of Health as a guide for ascertaining the bacteriological
cleanliness of ice-cream, the time taken to de-colourise methylene
blue being recorded and the sample graded as follows:—
Provisional Grade
Time taken to Decolourise
Methylene Blue
1 4½ hours or more
2 2½ to 4 hours.
3 ½ to 2 hours.
4 Less than ½ hour.
The 46 samples taken were placed in the following grades:—
37 samples were within Grade 1 standard
7 samples were within Grade 2 standard
2 samples were within Grade 4 standard