贵州赫坎按蚊类群地面分布、生态习性、传疟作用及防制的研究

INVESTIGATIONS ON THE DISTRIBUTION,BIONOMICS,ROLES OF THE ANOPHELES HYRCANUS GROUP IN THE TRANSMISSION OF MALARIA AND THE CONTROL OF IT IN GUIZHOU PROVINCE

经过4年的调查,共发现赫坎按蚊类群6种。中华按蚊种群数量大,占组成的61.23～99.84％,属半家栖,是贵州大部份地区的传疟媒介。嗜人按蚊主要分布在荔波、赤水、从江山间丘陵区和河谷低洼地区,偏家栖,喜吸人血,8月的数量占人房按蚊组成的54.28～95.24％,子孢子阳性率为0.74％,是该地区的主要传疟媒介;在荔波采取连续2年的成片室内滞留喷洒,疟疾发病率累计下降82.11％,恶性疟发病下降了98.65％,取得了明显的防制效果。

Six specics of Anopheles hyrcanus group were found in Guizhou Provi-nce through the investigations from 1984 to 1987. The Anopheles lesteri anthropophagus, the principal vector of malaria in these areas preferable for human blood and house resting, mainly distributed in the areas of the m-ountains and valleys in the counties of Libo, Chishui and Chongiiang. The quantity of the Anopheles lesteri anthropophagus accounted for between 54.28% and 95.24% of the total capture caught in the human dwellings in August and the sporozoite positive rate was found to be 0.74%. A drop of 82.11% in malarial incidence and a drop of 98.65% in falciparum malarial incidence were achieved two years after the large-scale indoor residual insecticide spraying in Libo County.