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 1957
[Report of the Medical Officer of Health for Sutton and Cheam]
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(2) Test Baiting (1957-1958)
The Borough was divided into five sections, as in previous
tests; and a test baiting of 10% of the soil-sewer manholes in
areas previously cleared or thought not to be Infested was
carried out during the month of September.
All the manholes baited were checked three days after the baits had been deposited, with the following results-
| SECTIONS | TOTAL | |||||
|---|---|---|---|---|---|---|
| A | B | C | D | E | ||
| Number of manholes baited | 18 | 25 | 49 | 58 | 34 | 184 |
| Complete bait takes | 1 | 2 | 12 | 9 | 4 | 28 |
| Partial bait takes | - | - | - | - | - | - |
| Baits not taken | 17 | 23 | 36 | 46 | 30 | 152 |
| Baits washed off | - | - | 1 | 3 | - | 4 |
(3) Treatment No. 23 - First Maintenance Treatment (1957-1958)
This treatment was confined to the sections known to have
been infested during the previous maintenance treatment together
with sections proved to be infested by the annual 10% Test, and
operations were completed on the 12th October, 1957.
Prebaltlng with damped sausage rusks with 0.25% of
paranltrophenol added as a bait preservative was carried out on
the first and sixth days, and the same bait base with 2£% Zinc
Phosphide added was laid on the ninth day; this procedure was
adopted in respect of 209 of the total of 351 manholes treated,
and the remaining 142 manholes were prebalted on the first and
third days and poison baited on the fifth day.
The following is a tabulated summary of the results achieved.
| SECTIONS | TOTAL | |||||
|---|---|---|---|---|---|---|
| A | B | C | D | E | ||
| Number of manholes prebaited | 30 | 12 | 141 | 111 | 57 | 351 |
| Complete prebait takes | 8 | - | 44 | 33 | 17 | 102 |
| Partial prebait takes | 2 | 1 | 37 | 20 | 17 | 77 |
| Percentage of takes (C. and P.) | 33.3 | 8.3 | 57.4 | 47.7 | 59.6 | 51.2 |
| Number of manholes poison baited | 15 | 4 | 101 | 65 | 40 | 225 |
The number of prebait takes shows an increase of 7.4% on
the previous maintenance treatment.
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