目的 通过对中华按蚊媒介能量监测,了解疟疾发病潜势,为疟疾预警与防控策略提供依据。方法 采用媒介能量调查方法 定量计算中华按蚊叮人率、人血指数、叮人习性和预期传染性寿命等参数,再按照Garrett-Jones(1964)的公式求出中华按蚊媒介能量和基本繁殖率。结果 中华按蚊种群数量呈逐年下降趋势,密度高峰出现在7月,中华按蚊吸血对象普遍存在且较容易,人血指数为0.097整体偏高,基本繁殖率高峰期在7月,均在临界值1.0以上。结论 宁波市存在一定的疟疾传播趋势,防控任务依然艰巨,需持续加大越冬蚊和早春第一代蚊虫的控制工作。

Objective To understand the potential of malaria by monitoring vectorial capacity of Anopheles sinensis, providing basis for early warning and prevention and control of malaria. Methods An investigation method for capacity of local vector transmission was used for quantitative calculation of An. sinences biting rate, human blood index, man-biting habit and expected life of infectivity, etc, and then the vector capacity and basic reproduction rate of An. sinensis was obtained according to the formula of Garrett-Jones (1964). Results The anopheles population declined year by year,the maximum density of An. sinensis was July, the host of An. sinensis was ubiquitous, the human blood index was 0.097 which was overall high, the peak season of basic reproduction rate was July, all higher than the critical value of 1.0. Conclusion There was a certain trend of malaria transmission, prevention and control task was still demanding, we need to increase mosquito control work of overwintering mosquitoes and the first generation mosquitoes of early spring.