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 Surbiton]
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3. SEWERS.
Test baiting of the Corporation's sewers was completed during the early part of the year. Areas
1,2,3 and 4, were tested during 1947. These"areas" are just a convenient geographical division
of the Borough for the purposes of this particular work.
Result of tests:-
Area | Number of Manholes test baited | Complete takes | Partial takes | No takes. | |
---|---|---|---|---|---|
5 | 23 | 2 | 2 | 19 | |
6 | 83 | 22 | 3 | 58 | |
7 | 19 | 1 | - | 18 | |
8 | 68 | 6 | - | 62 | |
9 | 56 | 5 | - | 51 | |
249 | 36 | 5 | 208 |
The above results may be considered as very satisfactory because whereas on the first treatment 77 of the
manholes treated, were found to be infested, the second treatment only revealed 14 infested manholes, a
reduction of 82%.
In April, the First Initial Treatment of the sewers was carried out, followed by the Second Initial Treatment in July, the results of the two treatments being as follows:-
1st Initial Treatment | 2nd Initial Treatment. | |||||
---|---|---|---|---|---|---|
Area. | No. Manholes pre-baited | No.Manholes showing takes of pre-bait | No. Manholes showing takes of poison baits. | No.Manholes pre-baited | No.Manholes showing takes of pre-bait. | No.Manholes showing takes of poison baits. |
1 | - | - | - | - | - | - |
2 | 23 | 9 | 7 | 8 | 6 | 2 |
3 | 23 | 1 | 1 | 1 | 1 | 1 |
4 | 30 | 9 | 5 | 12 | 3 | 2 |
5 | 10 | 1 | - | 1 | - | - |
6 | 92 | 31 | 9 | 29 | 3 | 3 |
7 | 3 | - | - | - | - | - |
8 | 18 | 13 | 5 | 13 | 1 | - |
9 | 19 | 13 | 4 | 13 | - | - |
218 | 77 | 31 | 77 | 14 | 8 |