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-20-
No. of Manholes Estimated No. Average kill
baited. of Rats killed. per manhole.
Northern Southern Northern Southern
half. half. half. half.
1st Treatment
1200 1567 1882 1020 1.04
2nd Treatment
682 573 246 480 0.578
4022 3628
Major Infestations
An occupier made application for assistance to disinfest
his premises. This proved to be a major infestation. The
whole of the land and buildings were inspected, and owing to
the large area within the curtilage of the premises it was
decided to mark all baiting points by the use of flags.
This method proved to be invaluable, especially when used in
connection with sewer recording form No. 2.
Some 74 dead rats were found which taken at the
conservative estimate of 10 per cent represents 740 rats
destroyed.
The two treatments were carried out in a similar
manner to that adopted for the sewers.
Mice.
The number of requests by householders for assistance
to disinfest houses of mice has increased 100 per cent, and
the numbers of requests is likely to increase still further.