苏州市输入性疟疾引发感染风险分析

Risk analysis of imported malaria infection in Suzhou City

目的了解苏州市消除疟疾后输入性疟疾引发继发感染的风险,为采取针对性防控措施提供依据。方法对2010—2020年传染病疫情网报数据和苏州市所辖10个市或区上报的疟疾病例数据进行整理分析,运用2019年媒介监测的灯诱法和人诱法对传播疟疾的蚊虫进行蚊种和密度调查,应用问卷调查结合消除疟疾现场考核数据对影响输入性疟疾引发继发感染的因素进行评分汇总。结果消除疟疾后苏州市疟疾病例均为输入性病例,无继发性感染病例,无疟疾的暴发流行,疟疾发病率控制在1/10万以下,且保持稳定,“1-3-7疟疾防控模式”执行效果状态良好,传播疟疾的媒介为中华按蚊,灯诱法平均密度为0.14只/(灯·h),人诱法平均密度为0.8只/(人·h),未发现嗜人按蚊。结论消除疟疾后苏州市输入性疟疾引起继发感染风险低,输入性疟疾延误治疗的风险较高。

Objective To understand the risk of secondary infection caused by imported malaria after the elimination of malaria in Suzhou City,provide a basis for the adoption of targeted prevention and control measures.Methods The infectious disease epidemic network data and the malaria case data reported by ten cities/districts under the jurisdiction of Suzhou City from 2010-2020 were compiled and analyzed,and the light trap method and the human trap method of vector monitoring in 2019 were used to investigate the species and density of the mosquitoes that transmit malaria.The questionnaire surveys combined with malaria elimination site assessment data were used to score and summarize the factors that affect imported malaria-induced secondary infections.Results After the elimination of malaria,all cases in Suzhou City were imported cases.There were no secondary infections and no outbreaks of malaria.The incidence of malaria was controlled below 1/100000 and remained stable.The implementation effect of the"1-3-7 Malaria prevention and control model"was in good condition.The vector of malaria transmission is Anopheles sinensis,the average density of light trap method was 0.14/(light·h)and the average density of human trap method was0.8/(light·h).Anopheles anthropophagus has not been found.Conclusion After the elimination of malaria,the risk of secondary infection caused by imported malaria in Suzhou City is low,and the risk of delayed treatment of imported malaria is higher.