江苏省2009—2012年流感监测结果分析

目的掌握江苏省2009—2012年流感的流行特征，为今后的流感防制工作提供科学依据。方法对江苏省2009—2012年流感样病例（influenza—likeillness，ILI）报告数据、病原学监测数据及流感／ILI暴发疫情报告情况进行分析。结果江苏省流感高发人群为14岁以下婴幼儿及儿童，2009—2012年每年病例人数分别占各年ILI数的71．64％、81．39％、83．70％和84．03％；流感全年出现冬季1～2月份和夏季8月份两个小流行高峰，近3年，发病水平呈下降趋势（Z=-247．91，P〈0．001）；2009—2012年分离到流感阳性毒株数分别为1615株、806株、555株和993株，毒株类型以B型和A（H3N2）型交替出现为主，偶尔伴有A（H1N1）等其他毒株散发；2009—2012年，江苏省共报告流感／ILI暴发疫情147起，其中84起发生在中小学校及托幼机构，占总疫情数的57．14％。结论2009年后江苏省虽然没有发生流感大流行，但流感监测工作仍然不能放松，特别是需要警惕新型流感毒株的出现，同时加强学校等聚集性场所暴发疫情监测。

Analysis on influenza surveillance data in Jiangsu Province, 2009 -2012

Objective To understand the epidemiologic characters of influenza in Jiangsu Province, so as to pro- vide scientific evidence for making preventive and control strategies of influenza. Methods Data were collected from ILl report, pathogen surveillance and influenza outbreak report from 2009 to 2012 in Jiangsu Province. Results The high-risk groups of influenza in Jiangsu Province were infants and children who under the age of 14. From 2009 to 2012, the number of infected infants and children respectively accounted for 71.64%, 81.39%, 83.70% and 84. 03% of the total ILl in that year. Annual two small epidemic peak appeared in Junuary to February and August. In recent three years, the incidence of flu was on the decline （Z = -247.91, P 〈0. 001 ）. The positive influenza strains were respectively 1 615, 806, 555 and 993 from 2009 to 2012, the types of strains were type B and type A （H3N2） appeared alternately, occasionally send out with the A （H1N1）, or other strains. In Jiangsu Province, from 2009 to 2012, the total reported outbreaks of flu/ILI were 147, 84 occurred in primary and secondary schools and childcare facilities, accounting for 57.14% of the total number of outbreaks. Conclusions Although influenza pandemic have not taken place in Jiangsu after 2009, influenza surveillance still can＇ t be relaxed. We should pay more attention to the new influenza viruses and enhancing the surveillance of school influenza outbreaks.