M 34
88. The incidence among the police of the New Territories for the same period was:
1925 1926 1927 1928 1929 1930 1931 1932 1,205 877 428 278 265 258 148 5589. Many of the Police Stations are screened and every man is provided with a mosquito net. Prophylactic quinine is issued and the living rooms are regularly sprayed with an insecticide in an endeavour to kill any adult mosquitoes they may be present. The police on night patrols are of course liable to infection.
90. The total number of deaths attributed to malaria was 455, giving a death rate of 0.56 per mille for the Colony. The lowness of the rate is, of course, due to the fact that the great majority of the population living in the drained urban areas are outside the zone of flight of malaria carrying anophelines and, therefore, not subject to risks of attack.
Dengue.
91. There was no epidemic of this disease during the year and only a few cases came under the notice of the Medical Officers.
Filariasis.
92. Researches carried out by the Malariologist show that this disease is far more prevalent than was supposed. An infection rate of 12 per cent was noted in one area. A full description of the investigations will be found in the Malariologist's Report. In spite of the number infected there are very few cases showing symptoms of elephantiasis.
Infectious Diseases.
93. The infectious diseases of the Colony may, for convenience, be classed into those which are notifiable and those which are not.
94. The most important of the non-notifiable infectious diseases are Pulmonary Tuberculosis and Leprosy.