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[目的]了解周宁县疟疾发病是否存在明显的季节性,为疟疾监测和控制提供科学依据。[方法]以圆形分布的理论和方法,先求出疟疾发病的集中度(r),后进行均匀性检验,若r与零在0.05水平上有显著差异,再求出角均数(α)和角离差(S),以推算集中时间和高峰期。[结果]我县1981—1988年疟疾发病的集中时间为5月8日(3月1日零时为零度角,α=66.41°),发病高峰期是3月4日至8月3日(S=84.75°);青壮年、男性和外流人员多发。[结论]我县1981—1988年疟疾有明显的季节性,好发时间有向温热季节集中趋势。近几年疟疾发病率低,仍不遗余力地加强外来流动人口和外出回归人员的监测和管理,加强蚊媒监测,以控制疟疾流行。
[Objective] To find out whether seasonal incidence of malaria in Zhouning County exists or not, and provide a scientific basis for malaria surveillance and control. [Method] According to the theory and method of circular distribution, the concentration (r) of malaria was first determined and then the homogeneity test was conducted. If there was a significant difference between r and zero at the level of 0.05, then the average number of angles ) And angular deviation (S) to calculate the concentration time and peak period. [Results] The incidence of malaria from 1981 to 1988 in our county was concentrated on May 8 (zero angle at 0:00 on March 1, α = 66.41 °), and the peak incidence was from March 4 to August 3 ( S = 84.75 °); young adults, men and outflows were frequent. [Conclusion] From 1981 to 1988, malaria in our county was obviously seasonal, with a good tendency to focus on the warming season. In recent years, the incidence of malaria is still low. No effort has been spared in monitoring and managing the floating population and returning returnees and the mosquito vector monitoring has been stepped up to control the malaria epidemic.