X1000306-1962-63_Part01 — Page 27

183. The results of anti-larval operations, as checked by routine adult mosquito catches and larval collections, are satisfactory and the incidence of natural malaria transmission in the controlled areas con- tinues to be virtually nil.

184. In most of the New Territories, control by anti-larval or anti- adult measures is at present impracticable because of the scattered population, the widespread traditional wet cultivation, and the unpro- tected contiguous borders and islands. The main line of defence against malaria for disciplined groups stationed in the New Territories therefore consists of such anti-larval measures as may be practicable in their immediate vicinity, screening where possible, and chemo-prophylaxis.

185. The cost of control measures during the year was 33 cents per head of population protected.

Incidence of Malaria

186. Malaria is a notifiable disease, and the returns of the past five years are set out in Table 12.

Your

1958

1959

1960

1961

1963

TABLE 12

MALARIA 1958-62

Caser Notified

Deaths

659

Lak

NA

442

1

1

833

r

812 194

• The making of rouune blood anttaus of all deterike chiktrem et 10 Yemes and yoooyer altersiling Government clialen in the rural areas was druminted in 1960.

187. 91.1% of all cases notified were from outside the protected arcas: 53.9% of the cases came from the area surrounding the town of Sai Kung on the east coast and 11.5% of the total from Lantau Island. Of the parasites identified 98.2% were P. vivax, 1.3% P. malariae and 0.5% P. falciparum.

188. Malariometric indices obtained from a survey carried out during the year in children between 2 and 9 years of age in II villages in the New Territories showed that the endemicity of malaria varied in different areas. Spleen rates ranged from 0% to 9% and parasite rates from 0% to 14.19%. A similar survey carried out during the previous year in 14 other villages gave spleen and parasite rates ranging from 0% to 40.2% and 0% to 20% respectively.

42

A

1.

This building, providing out-patient and maternal and child health facilities, was erected from The Anne Black Health Centre on Hong Kong Island, which was opened in September, 1962. funds divided equally by Dr. TaNG Shio-kin. C.B.E., [.L.D., and his friends, and by Government