M 133
obtained, 65 were dissected, 2 (3.07%) were found infected. In view of the proximity of this village to Lyemun Barracks this information was forwarded to the R.A.M.C. authorities.
Dissection of Mosquitoes for Filaria.
71. Mosquitoes obtained from Shing Mun Camp, Wo Li Hop, and Little Hong Kong, were examined for larval filariae. The results are shown in Table XIII. Three instances of double infection (malaria and filaria) were encountered, in an A. minimus from Shing Mun, in an A. minimus from Little Hong Kong, and in an A. jeyporiensis from Little Hong Kong.
IV. THE RESULTS OF FEEDING EXPERIMENTS.
Malaria.
72. From 25th November until 3rd December several batches of Anophelines were fed upon a patient in the Victoria Gaol Hospital, whose blood was found to contain numerous crescents and these only. The patient did not suffer from malaria symptoms during the period in question. As in the case of the filaria feeding experiments, every assistance was rendered by the Gaol authorities, the Hospital Supervisor giving the matter his personal attention.
73. The mosquitoes were obtained from larvae and pupae collected; all (except one A. hyrcanus and one A. jeyporiensis which fed twice) took only one blood meal although they were offered them on other occasions. Dissections were done on the fed mosquitoes from 7th December until 11th January 1936.
74. As many as 170 oocysts were counted in the midgut of one A. maculatus; in several of this species over 100 oocysts were counted. No salivary gland infections were met with although two of the A. maculatus were not dissected until 40 days after feeding; in these the oocysts measured about 50μ in diameter.
75. The results obtained were as follows:
Species No. which fed No. infected Percentage infected Average No. of oocysts per infected mosquito A. maculatus 22 14 63.63 67.71 A. minimus 11 5 45.48 48.40 A. jeyporiensis 2 2 100.00 2.5 A. hyrcanus var. sinensis 9 1M 133
obtained, 65 were dissected, 2 (3.07%) were found infected. In view of the proximity of this village to Lyemun Barracks this information was forwarded to the R.A.M.C. authorities.
Dissection of Mosquitoes for Filaria.
71. Mosquitoes obtained from Shing Mun Camp, Wo Li Hop, and Little Hong Kong, were examined for larval filariae. The results are shown in Table XIII. Three instances of double infection (malaria and filaria) were encountered, in an A. minimus from Shing Mun, in an A. minimus, from Little Hong Kong, and in an A. jeyporiensis from Little Hong Kong.
IV. THE RESULTS OF FEEDING EXPERIMENTS.
Malaria.
72. From 25th November until 3rd December several batches of Anophelines were fed upon a patient in the Victoria Gaol Hospital, whose blood was found to contain numerous crescents and these only. The patient did not suffer from malaria symp- tons during the period in question. As in the case of the filaria feeding experiments, every assistance was rendered by the Gaol authorities, the Hospital Supervisor giving the matter his personal attention.
73. The mosquitoes were obtained from larvae and pupae collected, all (except one A. hyrcanus and one A. jeyporiensis which fed twice) took only one blood meal although they were offered them on other occasions. Dissections were done on the fed mosquitoes from 7th December until 11th January 1936.
74. As many as 170 oocysts were counted in the midgut of one A. maculatus, in several of this species over 100 oocysts were counted. No salivary gland infections were met with although two of the A. maculatus were not dissected until 40 days after feeding; in these the oocysts measured about 50μ in diameter.
75. The results obtained were as follows:
Species.
No. which
No. infected.
fed.
Per- centage infected.
Average No. of oocysts per infected mosquito.
A. maculatus
22
14
63.63
67.71
A. minimus
11
5
45.48
48.40
A. jeyportensis
2
2
100.00
2.5
A. byrcanus var.
sinensis
9
1
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