London's Pulse: Medical Officer of Health reports 1848-1972

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Surbiton 1955

[Report of the Medical Officer of Health for Surbiton]

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The following is a summary of the several treatments carried out since disinfestation of sewers commenced in 1948-

DateDescriptionNo. of manholes pre-baitedTakes of pre-baitTakes of poison bait
April, 19481st Initial treatment2187731
July, 19482nd " "77148
February, 19491st Maintenance treatment804918
July, 19492nd " "71207
March, 19503rd " "584121
July, 19504th " "412013
February, 19515th " "571715
August, 19516th " "35146
February, 19527th " "693615
July, 19528th " "58144
February, 19539th " "54138
February, 195410th " "47168
August, 195411th " "1675
December, 195512th " "211814

Results of Initial and Annual Test Baiting-

No. of manholes baitedTakes of baitPercentage of takes
Initial 1947/83846416.666
Second 1948160138.125
Third 194922983.493
Fourth 195025093.600
Fifth 1951200115.500
Sixth 195220175.473
Seventh 195317973.91