云南省2009-2013年流感哨点医院监测结果分析

Monitoring results of influenza sentinel hospitals in Yunnan Province,2009-2013

目的探讨2009-2013年云南省流感的流行特征,为制定流感防制策略提供科学依据。方法应用EXCEL软件整理数据,GEODA软件及EXCEL软件对数据进行描述性分析,对2009-2013年云南省流感哨点医院监测的流感样病例(illness like influenza,ILI)监测资料、病毒分离鉴定结果、暴发疫情信息进行分析。结果 2009-2013年云南省监测到的流感样病例呈上升趋势,到2013年出现高峰。秋冬季为流感病例高发期。近五年内,保山、怒江和红河的ILI%相对较高。2009-2013年,全省各哨点医院共采集流感样病例标本49 139份,分离出流感毒株1 648株,毒株分离率为3.35%,其中优势株为B型Victoria系(527株,31.98%),其次为甲型H1N1亚型(429株,26.03%)、B型Yamagata系(352株,21.36%)、A型季节性H3N2亚型(295株,17.90%)和A型季节性H1N1亚型(45株,3.07%)。结论学龄儿童、青少年及年轻人是流感高发人群,加强学校流感监测和报告是有效控制疫情的关键。

Objective To investigate the epidemiological characteristics of influenza in Yunnan Province during 2009- 2013 so as to provide scientific evidence for formulating influenza prevention and control strategies. Methods Excel software and Geoda software were used for descriptive data analysis. The data about illness like influenza（ ILI） cases,virus strain isolation and identification results and information regarding the outbreaks in influenza sentinel hospitals in Yunnan Province from 2009 to 2013 were analyzed. Results The ILI cases in Yunnan Province during 2009- 2013 showed an upward trend,and there was a peak in2013. Autumn and winter were the high incidence seasons. In the past five years,ILI% in Baoshan,Nujiang,and Honghe areas was relatively high. 49,139 specimens of ILI cases were collected from influenza sentinel hospitals during 2009- 2013,and 1,648 influenza strains were isolated,with the positive rate of strain isolation being 3. 35%. The predominant strains were B / Victoria subtype（ 527 strains,31. 98%）,followed by A / H1N1 subtype（ 429 strains,26. 03%）,B / Yamagata subtype（ 352 strains,21.36%）,H3N2 subtype（ 295 strains,17. 90%） and H1N1 subtype（ 45 strains,3. 07%）. Conclusions School- age children,adolescents and young people are the high- risk population for influenza. Strengthening the monitoring and reporting of influenza in schools is the key point for effective control of the epidemic.