M 139
Hong Kong Jockey Club Stables.
108. Investigations were made as to the occurrence of malaria. Larval surveys were carried out during the early part of the year and practically only larvae of A. maculatus were found. The same results were obtained in surveys done at a later period. Morning catches were done monthly in the thatched huts below the Stables. These were inhabited by market gardeners, and were close to the streams in which A. maculatus had been found. No adult Anophelines were found in the hut but Culicines were.
109. On the 14th and 15th October, thick blood films were obtained from 100 riding boys who resided on the premises. Of these, 99 had lived there throughout the year, 1 for 2 months previously. Parasites were found in only 2 of these films, one of which belonged to the individual who had been in residence 2 months. None of these people use mosquito nets.
110. One of the Stable men was supplied with a catching bottle in order to ascertain if mosquitoes could be caught on the horses at night, but none were obtained. Perhaps better results could be got if the catching were superintended for a time by one of the Bureau Staff as was done at the Dairy Farm or perhaps the A. maculatus prefer the pigs of the market gardeners.
Patheung Valley.
111. This valley is situated near Au Tau Police Station, 27th mile Castle Peak Road, and is surrounded on all sides by high hills except on the west towards the sea; it is flat, and cultivated up to the foot of the hills, the cultivation being mainly rice. Most of the villages are situated close to the hills, but some are over 1,000 yards distant.
112. During the rainy season larval surveys were done in those portions of the streams and irrigation ditches which were remote from the hills, few larvae of A. hyrcanus were found and still fewer larvae of A. minimus, although the respective adults could be obtained without difficulty in catches done in the adjacent villages. At the end of the year larvae of A. hyrcanus and A. minimus were collected from portions of the streams and irrigation ditches remote from the hills, but considering the time spent and the ground covered, the numbers were not large; many more A. minimus were obtained from those portions of the streams which were nearer the hills.
113. Judging by spleen rates done in the schools, by the Anophelines caught in the villages and by the results of the examination of blood films taken from sick persons, evidence of malaria was obtained from every village even in those farthest from the hills. The results of spleen examinations are given in Table XV.
M 139
Hong Kong Jockey Club Stables.
108. Investigations were made as
were made as to the occurrence of malaria. Larval surveys were carried out during the early part of the year and practically only larvae of A. maculatus were found. The same results were obtained in surveys done at a later period. Morning catches were done monthly in the tnatched huts below the Stables. These were inhabited by market gardeners, and were close to the streams in which A. maculatus had been found. No adult Anophelines were found in the hut but Culicines were.
109. On the 14th and 15th October, thick blood films were obtained from 100 riding boys who resided on the premises. Of these, 99 had lived there throughout the year, 1 for 2 months previously. Parasites were found in only 2 of these films, one of which belonged to the individual who had been in residence 2 months. None of these people use mosquito nets.
110. One of the Stable men was supplied with a catching bottle in order to ascertain if mosquitoes could be caught on the horses at night, but none were obtained. Perhaps better results could be got if the catching were superintended for a time by one of the Bureau Staff as was done at the Dairy Farm or perhaps the A. maculatus prefer the pigs of the market gardeners.
Patheung Valley.
111. This valley is situated near Au Tau Police Station, 27th mile Castle Peak Road, and is surrounded on all sides by high hills except on the west towards the sea; it is flat, and, cultivated up to the foot of the hills, the cultivation being mainly rice. Most of the villages are situated close to the hills, but some are over 1,000 yards distant.
112. During the rainy season larval surveys were done in those portions of the streams and irrigation ditches which were remote from the hills, few larvae of A. hyrcanus were found and still fewer larvae of A. minimus, although the respective adults could be obtained without difficulty in catches done in the adjacent villages. At the end of the year larvae of A. hyrcanus and A. minimus were collected from portions of the streams and irrigation ditches remote from the hills, but con- sidering the time spent and the ground covered, the numbers were not large; many more A. minimus were obtained from those portions of the streams which were nearer the hills.
113. Judging by spleen rates done in the schools, by the Anophelines caught in the villages and by the results of the examination of blood films taken from sick persons, evidence of malaria was obtained from every village even in those farthest from the hills. The results of spleen examinations are given in Table XV.
No comments yet.
Private notes are available after approval.