【摘要】 目的掌握2009年甲型H1N1流感大流行后,河南省流感的季节性特征和流行毒株变化特征,为防控流感提供数据支持。方法运用流行病学描述性分析方法,对2010年-2015年河南省22家国家级流感监测哨点医院的流感样病例监测结果进行数据分析。结果河南省具有明显的流感冬春季节性,多数年份有秋季小高峰;近几年流行毒株为B型、季节性H3和新甲H1交替出现,每个季节一般由单一的血清型主导;新甲H1流感在2009年大流行之后,呈现季节性流行。结论河南省流感多数年份呈双峰流行,每个流行年度有2个或3个血清型(毒株)共同流行,新甲H1型已经替代此前流行的季节性H1型呈季节性流行;ILI就诊比例不宜单独作为反映流感流行趋势的指标。更多还原

【Abstract】 Objective This study aimed to learn the seasonal pattern and the characteristics of the pandemic strain in Henan province after the influenza A(H1N1) pandemic in 2009, and to provide data support for the flu prevention. Methods Descriptive epidemiological method was applied to analyze the surveillance data of influenza-like cases from 22 national influenza surveillance sentinel hospitals in Henan province during 2010-2015. Results Flu cases peaked in winter and spring and there was a small peak in autumn of most years in Henan. Pandemic strains appeared alternately among type B, seasonal H3 and new A(H1), with each season dominated by a single serotype. New A(H1) flu was a seasonal epidemic after 2009.Conclusion In most years in Henan province there were bimodal epidemic. Each year there were two or three dominant strains. New A(H1) has replaced previous seasonal H1. ILI clinic ratio should not be the single indicator reflecting the epidemic trend.更多还原