London's Pulse: Medical Officer of Health reports 1848-1972
View report page
Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Merton and Morden 1962
[Report of the Medical Officer of Health for Merton & Morden]
This page requires JavaScript
This method is more open to public health hazards and stricter control is necessary. 22 samples were obtained and submitted for bacteriological examination with the following results:—
| No. | Provisional Grade | Methylene Blue Test |
|---|---|---|
| 1 | 1 | Not decolourised after 4 hours |
| 2 | 1 | do. |
| 3 | 1 | do. |
| 4 | 1 | do. |
| 5 | 1 | do. |
| 6 | 1 | do. |
| 7 | 1 | do. |
| 8 | 1 | do. |
| 9 | 1 | do. |
| 10 | 1 | do. |
| 11 | 1 | do. |
| 12 | 2 | Decolourised after 4 hours |
| 13 | 1 | Not decolourised after 4 hours |
| 14 | 1 | do. |
| 15 | 1 | do. |
| 16 | 2 | Decolourised after 3 hours |
| 17 | 1 | Not decolourised after 4 hours |
| 18 | 4 | Decolourised immediately |
| 19 | 1 | Not decolourised after 4 hours |
| 20 | 3 | Decolourised after 1 hour |
| 21 | 1 | Not decolourised after 4 hours |
| 22 | 1 | do. |
The results are summarised as follows:—
| Provisional Grade 1 | 18 | 81.9% |
| Provisional Grade 2 | 2 | 9.1% |
| Provisional Grade 3 | 1 | 4.5% |
| Provisional Grade 4 | 1 | 4.5% |
| 22 | 100% |
No Chemical examinations were made.
35