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

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City of London 1926

[Report of the Medical Officer of Health for Port of London]

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Chickenpox- continued

Date.Name of Vessel, Port of Registry and Official NoWhere from.No. of Cases.How dealt with.
1926.Brought forward1 3
Jan 19ss " Kabinga," London, 125599.Hamburg1Removed to Port Sanitary Hospital, Denton.
Feb 4 Mar 18ss " Ranchi," Newcastle. ss " Rajputana," Greenock.Bombay1 1Proceeded home Landed at Gibraltar.
„ 23House-boat " Rosa lohn "Leigh-on-SeaRemained on board.
„ 27ss " Mongolia," Newcastle, 145517.Sydney1Isolated on board.
„ 29ss " Rajputana," Greenock.Bombay1Removed to Port Sanitary Hospital, Denton.
April 2ss " Mongolia," Newcastle, 145517.Sydney1Isolated in ship's hospital.
„ 12” ””3Removed to Port Sanitary Hospital, Denton.
„ 12TS " Arethusa."Greenhithe1Removed to ship's hospital ashore.
„ 15ss " Otranto."Sydney2Well on arrival.
„ 15ss " Ranchi," Newcastle.Bombay1Landed at Plymouth.
,, 16ss " Mongolia,"Sydney1Removed to Port Sanitary
Newcastle, 145517.Hospital, Denton.
May 11ss " Ballarat," Greenock, 145596.„1Landed at Plymouth
July 13P & 0 " Go Down."Tilbury Dock1Removed to Port Sanitary. Hospital, Denton.
„ 27”1” ”
Aug 26ss " Khyber," Liverpool, 125564.Bombay1” ”
„ 26ss " Naldera," Greenock, 142257.-1” ”
Sept 9ss " Ormonde," Glasgow, 141866.Brisbane1” ”
„ 16TS " Cornwall "Grays1” ”
„ 22ss " Marburn," Glasgow, 111248.MontrealI” ”
„ 23House-boat " Sea Point."Leigh Creek1Remained on board.
Oct 19ss " Baltriger," London, 145064.Danzig1Removed to Port Sanitary Hospital, Denton.
Dec 1ss " Baltannic," London, 148640.Riga1” ”
„ 10ss " Berrima," Greenock, 135322.Sydney1Landed at Southampton.
Total31

DENGUE FEVER
An addition to our exact knowledge on this disease has been made by human
experiment on volunteers, and may be summarised as follows:-
1 Vector of Infection, the mosquito Aedes egypti (not the also suspected
Culex quinquefasciatus)
2 A human being is infective to the mosquito from 18 hours before to three
days after onset of the disease
3 The mosquito infected, becomes infective to man in from 11 to 14 days
after sucking blood from a human being suffering from the disease
4 The mosquito remains then infective for man 75 days (proven) oritslife-time
5 The disease shows in man in from 4 to 10 days after being bitten by infected
mosquitos
The above data are from the Phillipine Islands
The limit of the Aedes egypti mosquito is the 60 deg F isotherm This isotherm,
in the summer and winter northern mean, passes along a line roughly
Florida, Southern Spain, Himalayas, Hong Kong
Thus cases of Dengue can be, and have been, reported from Southern Europe,
and in hot weather even to latitude 42 deg N
The Aedes egypti (synonyms Stegomyia calopus, Aedes calopus, Stegomyia
fasciata) is also the disseminating agent for Yellow Fever; by geographical
situation (in relation to temperature and the requirements of this mosquito) England
must of necessity be free from the gnat itself and from both of the pests it conveys
I have formerly reported epidemics of Dengue on shipboard, which have
occurred along the Indian coast