Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Shoreditch]
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46
A sample of "National" dried milk obtained from the Infant Welfare Centre
was submitted for examination and showed the satisfactory result of 600 bacteria
per gramme and absence of coliform bacillus in one gramme.
BACTERIOLOGICAL SAMPLING OF ICE CREAM
30 samples were submitted for plate count, one of which proved a spread colony. The remainder gave the following results of bacteria per milliliter.
1,000 to 5,000 | 6,000 to 10,000 | 11,000 to 50,000 | 51,000 to 100,000 | 101,000 to 900,000 | 1 million and over |
---|---|---|---|---|---|
9 | 6 | 8 | 2 | 3 | 1 |
53 samples were submitted to the methylene blue test with results as follows :—
Grade 1 8
„ 2 12
„ 3 10
„ 4 23
30 samples were examined for B. Coli with the following results:—
Absent in 1.0-ml. | Present in 1.0-ml. | Present in 0.1 -ml. | Present in 0.01-ml. | Present in 0.001-ml. | Present in 0.0001-ml. | Present in 0.00001-ml. |
---|---|---|---|---|---|---|
Warning letters were sent to the makers of sub-standard samples, and subsequent
inspections and tests showed greatly improved quality in the products.
The following table gives particulars of the work done under the Housing Acts in the form required by the Ministry of Health :—