2009-2010年河南省流感监测分析

目的分析2009-2010年河南省流感流行特征与病毒亚型分布情况,为制订流感防控策略提供依据。方法搜集国家流感监测网络数据进行分析;对核酸检测阳性的流感样病例(Influenza Like Illness,ILI)咽拭进行病毒分离。结果2009年ILI就诊率为5.1%,2010年ILI就诊率为1.2%,就诊高峰出现在2009年11月。2009-2010年共采集ILI咽拭子6 574份,分离到阳性毒株220株,分离率为3.3%。其中季节性H1N1流感(57株)和新型甲型H1N1流感(104株)为主要分离株,BV型流感次之(48株),分离高峰与ILI就诊高峰一致。结论2009年上半年先后出现季节性H1流感和BV型流感病毒的流行,8月至2010年1月为甲型H1N1流感大流行阶段,12月份到2010年3月份甲型H1N1流感流行峰快速下降而BV型流感呈小幅上升趋势。

Analysis and survellance of influenza in Henan from 2009 to 2010

Objective To analysis epidemic characteristics and distribution of influenza virus subgroup in Henan from 2009 to 2010,and to provide bases for the prevention of influenza.Methods The data from national influenza surveillance net work were collected to analyze,the ILI throat swabs which nucleic acid test showed positive were collected for virus separation.Results The percentage of seeking the doctors of ILI was 5.1 % and 1.2 % in 2009 and 2010,and the peak of seeking for the doctors was November 2009.6 574 samples of ILI throat swabs were collected,and 220 influenza virus isolated with isolating rate for 3.3 %.The types of strains were main influenza A1 virus(57 trains) and A(H1N1) virus(104 trains),followed by influenza B(Victoria) virus(48 trains),the time of high-peak was in line with crest-time of seeking for doctors of ILI patients.Conclusion A1 and B(Victoria) virus was epidemic sequentially during the earlier months in 2009,the pandemic period of A(H1N1) began from August 2009 to January 2010,the pandemic peak of A(H1N1) dropped quickly during the time December 2009 to March 2010,but the prevalent trend of B(Victoria) gone up slightly.