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
Ilford 1931
[Report of the Medical Officer of Health for Ilford]
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45
3. Milk Sampling.—16 samples of "Grade A (Tuberculin
Tested)," 4 samples of "Grade A," 1 sample of "Grade A
Pasteurised," 21 samples of "Pasteurised" milk, and 51 samples
of ordinary milk were taken.
The standard for "Grade A (Tuberculin Tested)" and "Grade A" milk
is that a sample shall be found to contain (a) not more than 200,000 bacteria
per cubic centimetre; and (b) no coliform bacillus in one-hundredth of a cubic
centimetre.
The following table shows the result of the analyses of the samples of "Grade A (Tuberculin Tested)" and "Grade A" milk:—
| "Grade A (Tuberculin Tested)." | "Grade A." | ||
|---|---|---|---|
| Sample No. | No. of Bacteria per c.c. | Sample No. | No. of Bacteria per c.c. |
| 4 | 660 | 15 | 12,780 |
| 5 | 480 | 17 | 5,590 |
| 6 | 495 | 53 | 8,900 |
| 10 | 2,920 | A .1 | 1,920 |
| 11 | 7,663 | — | — |
| 12 | 11,850 | — | — |
| 13 | 4,593 | — | — |
| 23 | 8,780 | — | — |
| 27 | 3,730 | — | — |
| 34 | 118,850 | — | — |
| 36 | 9,913 | — | — |
| 61 | 3.863 | — | — |
| 67 | 3,793 | — | — |
| 68 | 1,656 | — | — |
| C.5 | 793 | — | — |
| C.6 | 180 | — | — |
With regard to sample No. 34, the Ministry of Health were communicated
with owing to the presence of coliform bacillus in 1/100 c.c.
A letter of warning was sent to the producer from the Ministry. A further
sample taken at a later date proved satisfactory.
The standard for "Grade A Milk Pasteurised" is that a sample shall be
found to contain (a) not more than 30,000 bacteria per cubic centimetre ; and
(b) no coliform bacillus in one-tenth of a cubic centimetre.
One sample of this grade of milk (No. 33) was taken, the number of
bacteria being 170 per cubic centimetre; no coliform bacillus in one-tenth
of a cubic centimetre.
The standard for "Pasteurised" milk is that a sample shall be found to
contain not more than 100,000 bacteria per cubic centimetre.