Abstract:

Objective To study the law of seasonal variability of vivax malaria in Jiangsu Province from 1961 to 2010，so as to provide the reference for improving malaria control. Methods The data of vivax malaria incidence from the epidemic reporting system of Jiangsu Province were collected and analyzed to understand the month morbidity，peak prevalence time and mean dura? tions，and the peak incidence durations every 10 years with the circular distribution method. Results Vivax malaria appeared ob? vious seasonal variability（P < 0.01）with different peak time（P < 0.01） . The average peak time occurred on August 9th. The mor? bidity duration was shortest（75 d）in 1963 and longest（123 d）in 2010 with a mean duration of 93 days，and the peak duration extended 146 days in 10 years from 2001-2010 compared with that from 1960-1970. Conclusion The incidence of vivax malaria presents obvious seasonal peak in Jiangsu Province and its peak concentrates in mid?July to early August，and in nearly 10 years， the days of peak incidence of vivax malaria extended.

Key words: Vivax malaria； Round distribution； Seasonality；Peak incidence；Jiangsu Province

摘要：

目的 分析1961-2010年江苏省间日疟发病的季节性变化规律， 为间日疟防治提供参考依据。方法 收集江苏省疟疾疫情信息报告系统间日疟疫情资料， 按月统计间日疟发病数， 采用圆形分布法分析江苏省间日疟发病高峰日和高峰期天数， 并计算每10年发病高峰期天数。结果 江苏省间日疟发病具有明显的季节性 （P < 0.01）， 各年份发病高峰日不全相同 （P < 0.01）， 平均发病高峰日为8月9日。发病高峰天数平均为93 d， 最短为1963年的75 d， 最长为2010年的123 d。2001-2010年间日疟发病高峰期比1961-1970年延长146 d。结论 江苏省间日疟发病存在明显的季节高峰， 其发病高峰日多集中在7月中旬-8月上旬； 近10年间日疟发病高峰期天数呈延长趋势。

关键词: 间日疟； 圆形分布； 季节性； 发病高峰； 江苏省