M 125
16. Amongst the Indian troops there were 44 fresh cases, of which there were 8 in the first quarter, 3 in the second, 5 in the third, 28 in the 4th. In the first quarter, 1 of the cases was amongst troops who had been in camp, in the second quarter 2, in the fourth 20. The admissions work out for the year as 29.97 per thousand on an average strength of 1468.
Dengue.
17. According to returns received four cases of Dengue were admitted to Government Hospitals during the year.
Filaria.
18. Seven cases of disease due to filarial infection were reported from Government Hospitals during the year.
II.—GENERAL MOSQUITO SURVEY OF THE COLONY.
Anophelines.
19. The number and species of the various Anopheline larvae examined are given in Table VI. Table VII gives the number and species of the imagines obtained from pupae collected, and from pupae obtained from the larger larvae.
20. A. maculatus. Larvae were collected from the usual breeding places—streams, seepages, ditches. Adults were obtained by night catching done in the Dairy Farm cow byres, and in pigsties at Little Hong Kong, also by day catching done in dark ill-ventilated village byres and pigsties, and in the screened lines at Shing Mun Camp. Under ordinary circumstances this Anopheline is difficult to obtain from human dwellings.
21. Malarial infections in midguts and salivary glands were met with in the mosquitoes dissected, also larval filariae. This species was experimentally infected with subtertian malaria and with micro-filariae (W. bancrofti) at the Bureau.
22. A. minimus. Larvae were mostly met with in hill streams and irrigation ditches. As in previous years the hill streams appear to fall into three categories:-
(a) Those in which the larvae can be collected throughout the year except during or shortly after heavy rainfall.
(b) Those in which no larvae of A. minimus can be found during the period May to September inclusive, but were encountered in small numbers at other times.
- M 125
16. Amongst the Indian troops there were 44 fresh. cases, of which there were 8 in the first quarter, 3 in the second, 5 in the third, 28 in the 4th. In the first quarter, 1 of the cases was amongst troops who had been in camp, in the second quarter 2, in the fourth 20. The admissions work out for the year as 29.97 per thousand on an average strength of 1468.
Dengue.
17. According to returns received four cases of Dengue were admitted to Government Hospitals during the year.
Filaria.
18. Seven cases of disease due to filarial infection were reported from Government Hospitals during the year.
II.-GENERAL MOSQUITO SURVEY OF THE COLONY.
Anophelines.
19. The number and species of the various Anopheline larvae examined are given in Table VI. Table VII gives the number and species of the imagines obtained from pupae collected, and from pupae obtained from the larger larvae.
20. A. maculatus. Larvae were collected from the usual breeding places-streams, seepages, ditches. Adults were ob- tained by night catching done in the Dairy Farm cow byres, and in pigsties at Little Hong Kong, also by day catching done in dark ill-ventilated village byres and pigsties, and in the screened lines at Shing Mun Camp. Under ordinary circum- stances this Anopheline is difficult to obtain from human dwellings.
21. Malarial infections in midguts and salivary glands were met with in the mosquitoes dissected, also larval filariae. This species was experimentally infected with subtertian malaria and with micro-filariae (W. bancrofti) at the Bureau.
22. A. minimus. Larvae were mostly met with in hill streams and irrigation ditches. As in previous years the hill streams appear to fall into three categories:-
(a) Those in which the larvae can be collected throughout
the year except during or shortly after heavy rainfall.
(b) Those in which no larvae of A. minimus can be found during the period May to September inclusive, but were encountered in small numbers at other times.
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