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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 the energy of Anopheles sinensis and provide a basis for early warning and prevention and control of malaria. Methods We used the medium energy survey method to quantitatively calculate parameters such as bite rate, human blood index, bite habit and expected infective life of Anopheles sinensis, and then calculated the medium energy and basic reproduction of Anopheles sinensis according to the formula of Garrett-Jones (1964) rate. Results The population of Anopheles sinensis showed a downward trend year by year. The peak of density appeared in July. Anopheles sinensis was widespread and easy to be sucked up. The human blood index was 0.097, and the peak of basic reproduction rate was at July Above 1.0. Conclusion There is a certain trend of malaria transmission in Ningbo and prevention and control tasks are still arduous. It is necessary to continuously increase the control over overwintering mosquitoes and the first generation mosquitoes in early spring.