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
Sutton and Cheam 1961
[Report of the Medical Officer of Health for Sutton and Cheam]
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Rebaiting of all infested manholes continued until no bait takes were
recorded
The following is a summary of the results obtained:-
| Number of | Sections | |||||
|---|---|---|---|---|---|---|
| A | B | C | D | E | Total | |
| Manholes baited - 1st visit | 17 | - | 40 | 113 | 30 | 200 |
| Complete takes - 2nd visit | - | - | - | 1 | 1 | 2 |
| Partial takes 2nd visit | 1 | - | 1 | 15 | 4 | 21 |
| Complete takes - 3rd visit | - | - | - | - | 1 | 1 |
| Partial takes - 3rd visit | - | - | 1 | 11 | 4 | 16 |
| Complete takes - 4th visit | - | - | - | - | - | - |
| Partial takes - 4th visit | - | - | - | - | 4 | 4 |
| Takes - 5th visit | - | - | - | - | - | Nil |
(2) Test Baiting (1961-62)
The Borough was divided into five sections, as in previous tests, and
a test baiting of 10% of the soil sewer manholes carried out from the 18th
to 25th September, 1961.
All the manholes baited were checked three days after the baits had been deposited, with the following results:-
| Number of | Sections | |||||
|---|---|---|---|---|---|---|
| A | B | C | D | E | Total | |
| Manholes baited | 30 | 53 | 32 | 41 | 39 | 195 |
| Complete takes | 7 | 1 | 2 | 6 | 5 | 21 |
| Partial takes | 2 | 1 | 3 | 4 | - | 10 |
| Baits not taken | 21 | 49 | 27 | 29 | 33 | 159 |
| Baits washed off | - | 2 | - | 2 | 1 | 5 |
(3) Treatment No. 29 - First Maintenance Treatment (1961-62)
This treatment was confined to the sections known to have been
infested during the previous maintenance treatment (No.28) together with
those sections proved to be infested by the annual 10% test baiting, and
operations were completed on the 6th November, 1961.
Warfarin 0.5% Master Mix was again used, as this poison is harmless
to the operators using it and a more positive result is anticipated by the
complete eradication of rats in the sewers treated.
Rebaiting and examination of the infested manholes continued until no
bait takes were recorded.
The following is a tabulated summary of the results achieved:-
41