2014—2019年山东省沂源县发热伴血小板减少综合征流行特征分析

Analysis of epidemiological characteristics of severe fever with thrombocytopenia syndrome in Yiyuan of Shandong Province,from 2014 to 2019

【目的】了解山东省沂源县发热伴血小板减少综合征(severe fever with thrombocytopenia syndrom,SFTS)的流行病学特征,为制订科学防控措施提供依据。【方法】采用描述性流行病学方法对2014—2019年沂源县SFTS疫情数据进行分析。【结果】2014—2019年沂源县共报告SFTS病例130例,报告死亡4例,年平均报告发病率为3.79/10万,6年间的报告发病率整体呈上升趋势(χ_(Trend)^(2)=9.06,P=0.003)。SFTS报告病死率为3.08%。5~8月为发病高峰(88.46%),发病年龄集中在≥50岁人群(81.54%),职业以农民为主(94.62%),发病到确诊中位时间为5 d。【结论】SFTS在沂源县分布范围广,病例分布有明显季节性,发病人群主要是农村中老年人,应加强对农村中老年高危人群防控工作。

[Objective] To understand the epidemiological characteristics of severe fever with thrombocytopenia syndrome(SFTS) in Yiyuan County,and provide scientific evidence for prevention and control strategies.[Methods]Descriptive epidemiological methods were used to analyze the incidence of SFTS in Yiyuan County during 2014—2019.[Results]A total of 130 SFTS cases were documented in Yiyuan County during 2014—2019,of which four were death cases.The annual incidence was determined to be 3.79/105 and the mortality was 3.08%,showing an upward trend in the incidence(χ_(Trend)^(2)=9.06,P=0.003).Majority of the cases occurred between May and August(88.46%),were more than 50 years old(81.54%),and farmers(94.62%).The median duration of time from onset to diagnosis was five days.[Conclusion]SFTS was widely distributed in Yiyuan County with seasonal pattern.Middle aged and elderly farmers were mainly susceptible.It warrants strengthening prevention and control of SFTS and health education in elderly.