Ambulance Brigade with the police and the Medical Department; St. John Ambulance Brigade providing the technical staff and the Medical Depart- ment the equipment and drugs. These patrols have been much appreciated by the villagers and their value has been further enhanced by a voluntary dental service organized by the Hong Kong Dental Society.
110. Anti-malarial work is controlled by the Malaziologist who has a team of Malarial Inspectors and daily paid workers under him. A report on this work will be found in Annexure N.
(iii) Anti-Epidemic.
111. This work was under the control of the Senior Health Officer until August, when an epidemiologist was appointed.
112. Malaria was made a notifiable disease in June.
113. Infective hepatitis became very prevalent in the Colony during the year, particularly among the armed forces, and by the voluntary co- operation of the doctors in the Colony this disease was notified and some information as to its extent became available.
114. In order to reduce the time taken by medical practitioners in notifying diseases, a modified notification form was introduced consisting of a pre-addressed and postage free folder, and requiring the minimum of writing from the notifying doctor. The new form was also designed so that it could be used for quick reference for statistical purposes.
115. The principal work of the Anti-Epidemic Office is directed against smallpox and cholera, 1,431,676 vaccinations being done during the year and 615,968 cholera inoculations. There was no case of cholera reported during the year, and only one suspected case of smallpox. Immunization compaigns were put into operation against smallpox during the winter months and cholera during the spring and summer months. Efforts were concentrated in the first place on the squatter camps; other sections of the community being dealt with later. Notice of these cam- paigns was published in the press, and in the case of firme and factories with a staff of 50 and over, arrangements were made for a team to visit the office or factory concerned. This proved a most effective method.
116. Rodent control was, for the greater part of the year, directed by an officially appointed officer. It consists of the systematic destruc- tion of rats and the examination of all trapped live rats for fleas, which are counted and classified, and the prevailing flea index established. The public is encouraged to put dead rats into public rat-bins. These are collected daily and sent to the public mortuaries, where they are all examined microscopically and a proportion, including those showing any abnormality, have spleen smears taken and a microscopic examination made.
117. Both Rattus norwegious and Rattus rattus are found in tenement houses, but the former is the more common. Rattus rattus is more common in ships.
118. Other anti-epidemic measures are directed against contamination of food such as cut fruits, shellfish and milk and icecream products during their manufacture and sale.
119. Immunization against diphtheria is carried out in schools and infant welfare centres. Effort has been made to extend this service.
120. Table 16 shows the number of vaccinations and inoculations done each month.
Month 1950
January February March April
May
June
TABLE 16,
The number of Inoculations and Vaccinations done
during 1950.
No. of persons
Anti- Anti- Anti- Anti- Anti- treated Anti- Anti- Smallpox Cholera Diphthe- Typhoid Plague with Typhus Tetanus
Vaccina-inocula-
Anti- ria ino- inccula- inocula-
inocula- inocule- tions tions culations tions. tions
Tabies tions inocula-
中
tions
+++++
221,722 6,802 1,158 2,200 164,023
377 2,970 238.469 7.223
665 4,369 159,779
24,897 655 2,208
6
1,229
3
513
655
935
1.751
1,060
1
562
1,410
1,110
75,187 | 118,663
715
2.892
11
561
1,195
1,319
26.630 | 139,371
233
6,054
663
1,067
1,277
27,915 107,586
21.148
046
1,296
August
18,330 90,701
137
9.679
894
1.140
September. October
15,280 92,773
139
7,509
439
318
1,197
139,027 10,484
197
3320
206
785
1.216
November 188,822 6.408 December 166,486 6.098
3,702
2.685
862.
1,241
8.262 2.436
270 1.067 1,000
1.431,676 | 615,968
16,423 67.410
120
6.091 11.850 14,115
vly
TOTAL
(iv) X-Ray of Government Staff.
121. An X-ray survey of Government staff was carried out in 1949-50 involving a total of 22,688 persons of both sexes between the ages of 18 and 60 years. This figure constitutes about 98% of all Government staff, and includes also a number of teachers employed in private schools.
122.
It is proposed, in future, to carry out this survey each year.
123. The overall incidence of active pulmonary tuberculosis was 1.1% or three times the incidence of active pulmonary tuberculosis found on
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