M 149
Infection rates of both these Anophelines were low in the first quarter of the year, rose in the second, remained high in the third reaching a peak in July, and declined in the fourth quarter. Heavy infections in both glands and midguts were frequently encountered. Owing to pressure of work during April the salivary glands alone of 416 A. jeyporiensis were dissected. 18 were found infected, or 4.3%. The salivary glands alone of 85 A. minimus were dissected, 9 were found infected or 10.6%. Similarly in May the salivary glands of 1801 A. jeyporiensis were dissected, 39 were found infected, or 2.16%. The salivary glands of 644 A. minimus were dissected, 25 were found infected, or 2.88%. These records are not included in Table XVI.
It will be noticed in Table XIV that the catch of A. hyrcanus hitherto a small one, commenced to rise in September and attained comparatively large dimensions for the rest of the year. This was due to attempts made to render the lines mosquito proof, which resulted in making them mosquito traps. Infections were met with in the salivary glands as well as the midguts. In the medium sized oocysts the pigment was always found to be arranged in wisps or swathes, to be very fine and of a brownish yellow colour. This colour and arrangement of pigment has been stated to be characteristic of infection with benign tertian. Heavy infections of the midgut were only met with on one occasion when 120 oocysts were counted. The infection rate of this mosquito was low compared with that of A. minimus or A. jeyporiensis. In the month of May 127 A. minimus had an infection rate of 15%. During the same month no infections were found in 84 A. hyrcanus.
8 A. maculatus were found infected out of 230 dissected. No infections were found in the salivary glands. Four oocysts were found in one midgut, 3 of which contained sporozoites, in another midgut there were 40 oocysts, but the usual numbers were 3 or 4. The results of the dissections for larval filaria are found in Table XVII. One A. hyrcanus and one A. maculatus were found infected. The form found in the A. maculatus resembled that found in the same species in Wo Li Hop.
(3) Wo Li Hop Village.
Wo Li Hop is a village consisting of 26 human habitations. These are built of stone and roofed with tiles. The population of the village is about 126. In three instances cows were accommodated in one of the rooms of a dwelling, in five, cows, pigs and fowls were kept in a separate house, and in ten instances, pigs only were housed in pigsties. In all these animal shelters there was very little light and ventilation and the great majority of mosquitoes caught were obtained from them. Out of 1316 A. minimus, 4041 A. jeyporiensis, 194 A. maculatus, 197 A. hyrcanus captured, 1118 A. minimus, 3491 A. jeyporiensis, 182 A. maculatus, 158 A. hyrcanus were taken in the animal shelters.
M 149
Infection rates of both these Anophelines were low in the first quarter of the year, rose in the second, remained high in the third reaching a peak in July, and declined in the fourth quarter. Heavy infections in both glands and midguts were frequently encountered. Owing to pressure of work during April the salivary glands alone of 416 A. jeyporiensis were dissected. 18 were found infected, or 4.3%. The salivary glands alone of 85 A. minimus were dissected, 9 were found infected or 10.6%. Similarly in May the salivary glands of 1801 A. jeyporiensis were dissected, 39 were found infected, or 2.16%. The salivary glands of 644 A. minimus were dissected, 25 were found infected, or 2.88%. These records are not included in Table XVI.
It will be noticed in Table XIV that the catch of A. hyrcanus hitherto a small one, commenced to rise in September and attained comparatively large dimensions for the rest of the year. This was due to attempts made to render the lines mosquito proof, which resulted in making them mosquite traps. Infections were met with in the salivary glands as well as the midguts. In the medium sized oocysts the pigment was always found to be arranged in wisps or swathes, to be very fine and of a brownish yellow colour. This colour and arrangement of pigment has been stated to be characteristic of infection with benign tertian. Heavy infections of the midgut were only met with on one occasion when 120 oocysts were counted. The infection rate of this mosquito was low compared with that of A. minimus or Á. jeyporiensis. In the month of May 127 A. minimus had an infection rate of 15%. During the same month no infections were found in 84 A. hyrcanus.
8 A. maculatus were found infected out of 230 dissected. No infections were found in the salivary glands. Four oocysts were found in one midgut, 3 of which contained sporozoites, in another midgut there were 40 oocysts. but the usual numbers were 3 or 4. The results of the dissections for larval filaria are found in Table XVII. One A. hyrcanus and one A. maculatus were found infected. The form found in the A. maculatus re- sembled that found in the same species in Wo Li Hop.
(3) Vo Li Hop Village.
Wo Li Hop is a village consisting of 26 human habitations. These are built of stone and roofed with tiles. The population of the village is about 126. In three instances cows were accom- modated in one of the rooms of a dwelling, in five, cows, pigs and fowls were kept in a separate house, and in ten instances, pigs only were housed in pigsties. In all these animal shelters there was very little light and ventilation and the great majority of mosquitoes caught were obtained from them. Out of 1316 A. minimus, 4041 A. jeyporiensis, 194 A. maculatus, 197 A. hyrcanus captured, 1118 A. minimus, 3491 A. jeyporiensis, 182 A. macula- tus, 158 A. hyrcanus were taken in the animal shelters.
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