M 135
81. The maximum number of filariae found in any of the A. minimus was 2, in any of the A. maculatus 18, and in any of the A. (F). togoi 14.
82. Proboscis infections were met with in A. maculatus, A. (F) togoi; in the case of A. minimus fully developed forms were found in the head. In these experiments the mosquitoes had only one opportunity of feeding.
83. Table XIV gives findings obtained from examinations for micro-filariae of thick films made from prisoners admitted to Victoria Gaol. These films were taken in the daytime for examination for malarial parasites.
V.—INVESTIGATIONS AS TO THE PREVALENCE OF MALARIA
IN CERTAIN AREAS.
Queen Mary Hospital neighbourhood.
84. Mosquito catches were made in the matsheds on the site which housed about 400 coolies employed on levelling and building. From January until July monthly visits were made, after June weekly visits, as incidence of malaria is usually higher from that time onwards. The Inspector engaged in catching did not find it necessary to take any blood films nor did he obtain any Anophelines.
85. Several surveys have been done in previous years within a circle of half mile radius from the site, as indicated by the circle on the attached map. Larvae of A. maculatus have always been found in abundance but few larvae of A. minimus except when the surveys were done in the colder months when they were sometimes met with in comparatively large numbers in a small sector of the half mile circle in the neighbourhood of Mount Davis Road. In this sector in which there were neither cattle nor pigs, 19 out of 26 children (78%) examined in 1931, had enlarged spleens.
86. In the remaining sector of the half mile circle, 124 children were examined; 3 (2.4%) had enlarged spleens; this sector contained numerous cattle and pigs, the property of the Dairy Farm Company.
87. Monthly larval surveys were continued in two streams (A) and (B) north and south of Mount Davis Road, as far as possible all larvae present were collected; in (A) between Conduit Road and Forestry Path, in (B) between Island and Victoria Roads. Similar results were obtained to those of previous years; in neither stream were A. minimus found during the period May-September inclusive; during the rest of the year they were either absent, or present in insignificant numbers in (A), but
M 135
81. The maximum number of filariae found in any of the A. minimus was 2, in any of the A. maculatus. 18, and in any of the A; (F). togoi 14.
82. Proboscis infections were met with in A. maculatus, A. (F) togoi; in the case of A, minimus fully developed forms were found in the head. In these experiments the mosquitoes, had only one opportunity of feeding.
83. Table XIV gives findings obtained from examinations for micro-filariae of thick films made from prisoners admitted to Victoria Gaol. These films were taken in the daytime. for examination for malarial parasites.
V.-INVESTIGATIONS AS TO THE PREVALENCE OF MALARIA ·
IN CERTAIN AREAS.
Queen Mary Hospital neighbourhood.
84. Mosquito catches were made in the matsheds on the site which housed about 400 coolies employed on levelling and building. From January until July monthly visits were made, after June weekly visits, as incidence of malaria is usually higher from that time onwards. The Inspector engaged in catching did not find it necessary to take any blood films nor did he obtain any Anophelines.
■
85. Several surveys have been done in previous years within a circle of half mile radius from the site, as indicated by the circle on the attached map. Larvae of A. maculatus have always been found in abundance but few larvae of A. minimus except when the surveys were done in the colder months when they were sometimes met with in comparatively large numbers in a small sector of the half mile circle in the neighbourhood of Mount Davis Road. In this sector in which there were neither cattle nor pigs, 19. out of 26 children (78%) examined in 1931, had enlarged spleens.
86. In the remaining sector of the half mile circle, 124 children were examined 3 (2.4%) had enlarged spleens, this sector contained numerous cattle and pigs, the property of the Dairy Farm Company.
87. Monthly larval surveys were continued in two streams (A) and (B) north and south of Mount Davis Road, as far as possible all larvae present were collected in (A) between Conduit Road and Forestry Path, in (B) between. Island: and Victoria Roads. Similar results were obtained to those of previous years, in neither streams were A. minimus found during the period May-September inclusive, during the rest of the year they were either absent, or present in insignificant numbers in (A), but
No comments yet.
Private notes are available after approval.