M 135
55. The material examined by Dr. Toumanoff from Little Hong Kong was obtained from the market gardeners' huts, there are no cattle in the neighbourhood, but many pigs.
56. No Anophelines were captured at the Sun Wai dog kennels.
57. From the evidence submitted in both Tables, it would seem that A. hyrcanus and A. maculatus have a marked partiality for the blood of cattle and pigs, but that this partiality is not so marked as regards A. minimus or A. jeyporiensis.
58. A factor requiring to be taken into consideration in any given area is the respective number of human beings and animals, and its alteration may be one of the reasons why outbreaks of malaria are so liable to occur in large bodies of labourers when their camp is located in the vicinity of a village which had hitherto only suffered slightly from malaria owing to the amount of protection afforded by its animals.
59. From results obtained at Little Hong Kong, it would seem that pigs whilst attracting A. hyrcanus and A. maculatus, do not appear to have the same attraction for A. minimus. 1931 a high spleen rate 82.25% out of 62 children examined was found at Little Hong Kong where there are no cattle but many pigs; at new Shiek O in 1932 where there are cattle as well as pigs no enlarged spleens were found in 25 children tested. It may be that cattle are a better protection against A. minimus than pigs. Further investigation on these lines may prove interesting.
IV. INVESTIGATIONS AS TO THE PREVALENCE OF MALARIA IN CERTAIN AREAS.
Cheung Chau Island.
60. A request was received from the A.D.M.S. China Command, for information regarding the incidence of malaria during the summer months.
61. The Island was visited on the 7th and 8th May by the Assistant to Malariologist and four Inspectors. Larval collections were made from ditches and sumps in the ravines all of which are cultivated, 95 A. maculatus, 34 A. hyrcanus were obtained. No Anopheline mosquitoes were captured from the habitations searched.
62. The Assistant to Malariologist examined 544 children, and found only 2 with enlarged spleens. The Cheung Chau police station has a low malarial incidence in comparison with others.
63. Arrangements have been made for further investigations in the coming year.
M 135
55. The material examined by Dr. Toumanoff from Little Hong Kong was obtained from the market gardeners' huts, there are no cattle in the neighbourhood, but many pigs.
56. No Anophelines were captured at the Sun Wai dog kennels.
57. From the evidence submitted in both Tables, it would seem that A. hyrcanus and A. maculatus. have a marked partiality for the blood of cattle and pigs, but that this partiality is not so marked as regards A. minimus or A. jeyporiensis.
58. A factor requiring to be taken into consideration in any given area is the respective number of human beings and animals, and its alteration may be one of the reasons why out- breaks of malaria are so liable to occur in large bodies of labourers when their camp is located in the vicinity of a village which had hitherto only suffered slightly from malaria owing to the amount of protection afforded by its animals.
In
59. From results obtained at Little Hong Kong, it would seem that pigs whilst attracting A. hyrcanus and A. maculatus, do not appear to have the same attraction for A. minimus. 1931 a high spleen rate 82.25% out of 62 children examined was found at Little Hong Kong where there are no cattle but many pigs; at new Shiek O in 1932 where there are cattle as well as pigs no enlarged spleens were found in 25 children tested. It may be that cattle are a better protection against A. minimus then pigs. Further investigation on these lines may prove interesting.
IV. INVESTIGATIONS AS TO THE PREVALENCE OF MALARIA
IN CERTAIN AREAS.
Cheung Chau Island.
60. A request was received from the A.D.M.S. China Command, for information regarding the incidence of malaria during the summer months.
61. The Inland was visited on the 7th and 8th May by the Assistant to Malariologist and four Inspectors. Larval collections were made from ditches and sumps in the ravines all of which are cultivated, 95 A. maculatus, 34 4. hyrcanus were obtained. No Anopheline mosquitoes were captured from the habitations searched.
62. The Assistant to Malariologist examined 544 children, and found only 2 with enlarged spleens. The Cheung Chau police station has a low malarial incidence in comparison with others.
63. Arrangements have been made for further investigations in the coming year.
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