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目的了解2006-2007年江苏省流行性感冒(流感)流行特征。方法收集国家级监测哨点医院的流感样病例(ILI)资料、全省病原学分离检测结果以及流感或ILI暴发疫情资料进行分析。结果2006年和2007年(计1-52周)2年度,徐州、南京、无锡、丹阳4个监测点共登记ILI分别为94231、102099例,流感样病例百分比(ILI%)分别为4.67%、4.87%,两构成比差异有统计学意义(χ2=85.18,P=0.0000),其中徐州、南京、无锡、丹阳市的ILI%分别为7.18%、5.06%、3.66%、2.00%。2006-2007年流感或ILI暴发中,采集标本进行实验室检测的为56起(94.92%),其中流感病毒阳性52起(92.86%)。实验室确诊流感暴发疫情年度分布显示:2006年主要以B型(94.12%)为主,2007年主要以A型H3N2亚型(66.67%)和B型(33.33%)为主,根据月份分布显示:所有暴发疫情均分布在1-5月和9-12月,其中1-3月是流行高峰,共45起(86.54%),病原学显示2006年1-2月全省发生大范围的B型(Victoria系)流感暴发,2007年1月发生较大规模的H3N2亚型流感暴发。结论2006-2007年江苏省流感活动相对稳定,但仍存在局部暴发,哨点医院的ILI和暴发疫情的病毒分离均显示A型H3N2亚型、B型Victoria系为优势毒株。流感流行季节的变化趋势及其预警机制的建立需要进一步探讨。
Objective To understand the epidemic characteristics of influenza (influenza) in Jiangsu Province from 2006 to 2007. Methods The data of influenza-like illness (ILI) from national surveillance sentinel hospitals, the results of etiological isolation tests in the province and the outbreak data of influenza or ILI were collected for analysis. Results In the two years 2006 and 2007 (1-52 weeks), the ILIs registered at the four monitoring points of Xuzhou, Nanjing, Wuxi and Danyang were respectively 94231,102099 and the percentages of ILI were 4.67% 4.87%. There was significant difference between the two components (χ2 = 85.18, P = 0.0000). The ILI% of Xuzhou, Nanjing, Wuxi and Danyang were 7.18%, 5.06%, 3.66% and 2.00% respectively. Among the influenza or ILI outbreaks in 2006-2007, 56 samples (94.92%) were collected for laboratory tests, of which 52 (92.86%) were positive for influenza virus. The annual distribution of laboratory-confirmed influenza outbreaks showed that B type (94.12%) was the main type in 2006, mainly A type H3N2 subtype (66.67%) and B type (33.33%) in 2007, according to the monthly distribution : All the outbreaks were distributed in January-May and September-December, of which 1 to March is the peak of the epidemic, a total of 45 (86.54%), etiology showed that in January-February 2006, the province occurred a wide range of B (Victoria) flu outbreak in January 2007 with a larger outbreak of H3N2 subtype influenza. Conclusion The influenza activity in Jiangsu Province was relatively stable from 2006 to 2007, but there were still some outbreaks. The virus isolated from the sentinel hospital ILI and outbreak showed type A H3N2 subtype and type B Victoria strain was the dominant strain. The trend of influenza epidemic season and the establishment of its early warning mechanism need to be further explored.