M 134
76. It is hoped to carry out further experiments including those on patients harbouring benign tertian and quartan gametocytes.
Filaria.
77. It has hitherto been considered that the larval filariae found in the dissections of Anophelines and C. fatigans were derived from human sources, in order to confirm this, feeding experiments were done with various mosquitoes which were fed upon patients in the Victoria Gaol Hospital, whose blood contained W. bancrofti. Arrangements were made accordingly, with the co-operation of the Superintendent of Prisons and the Medical Officer Gaol. The Hospital Supervisor rendered valuable assistance.
78. On the 18th, 19th, and 20th September batches of C. fatigans, and A. hyrcanus var. sinensis were fed with the following results:-
Species No. which fed. No. dissected. No. infected. Percentage infected. Average No. filaria per infected mosquito. C. fatigans 14 14 11 78.57 5.22 A. hyrcanus var. sinensis 18 18 6 33.33 7.1479. Of the A. hyrcanus the maximum number of filariae found in one mosquito was 43, of the C. fatigans 38. Proboscis infections were met with in both.
80. Batches of A. minimus, A. maculatus, A. (S) albopictus, A. (F) togoi were fed upon another patient during the period 9th October-24th October, with the following results:-
Species No. which fed. No. dissected. No. infected. Percentage infected. Average No. filaria per infected mosquito. A. minimus 10 10 4 40.00 1.50 A. maculatus 11 11 4 36.36 6.75 A. (F) togoi 2 64 32 50.00 4.87 A. (S) albopictus 8 8M 134
76. It is hoped to carry out further experiments including those on patients harbouring benign tertian and quartan gametocytes.
Filaria.
77. It has hitherto been considered that the larval filariae found in the dissections of Anophelines and C. fatigans were derived from human sources, in order to confirm this,⚫ feeding experiments were done with various mosquitoes which were fed upon patients in the Victoris Gaol Hospital, whose blood contain- ed W. bancrofti. Arrangements were made accordingly, with the co-operation of the Superintendent of Prisons and the Medical Officer Gaol. The Hospital Supervisor rendered valuable assistance.
78. On the 18th, 19th, and 20th September batches of C. fatigans, and A. hyrcanus var. sinensis were fed with the following results:-
No. No.
No.
Per-
Average No. filaria
Species.
which
fed.
dis- sected. fected.
in-
centage
per infected
infected.
mosquito.
C. fatigans
14
14
11
78.57
5.22
A. hyrcanus var.
sinensis
18
18
6
33.33
7.14
79. Of the A. hyrcanus the maximum number of filariae found in one mosquito was 43, of the C. fatigans 38. Proboscis infections were met with in both.
80. Batches of A. minimus, A, maculatus, A. (S) albopictus, A. (F) togoi were fed upon another patient during the period 9th October-24th October, with the following results:-
Species.
No. which
fed.
No. dis-! in- sected. fected.
No.
Per-
Average
centage infected.
No. filaria per infected
mosquito.
A.' minimus
10
%10
4
40.00
1.50
A. maculatus
11
11
4
36.36
6.75
A. (F) togoi
2
64
32
50.00
4.87
A. (S) albopictus.
8
8
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