南宁市2009～2013年流感监测结果分析

Results of influenza surveillance in Nanning from 2009 to 2013

目的了解南宁市2009-2013年流感流行特征,为制定流感防制策略提供科学依据。方法通过＂中国流感监测信息系统＂收集2009-2013年南宁市国家级哨点医院流感样病例（ILI）监测数据、病原学监测结果进行分析。结果 2009-2013年南宁市平均ILI%为18.5%,病例以〈15岁儿童为主。共采集ILI标本6 048份,核酸检测阳性标本1118份,阳性率为18.5%,其中甲型H1N1型471份,A（H1N1）型22份,A（H3N2）型289份,B型336份。2009年流感季节类型为甲型H1N1和A（H3N2）型混合型,2010年为B型、甲型H1N1和A（H3N2）型混合型,2011年甲型H1N1占优势,2012年为B型和A（H3N2）型混合型,2013年为甲型H1N1和B型混合型。结论甲型H1N1、A（H3N2）型和B型在不同年份、不同季节表现出交替占优势的特征,发病以15岁以下儿童为主。

Objective To understand the epidemic characteristics of influenza in Nanning from 2009 to 2013 so as to provide scientific basis for the prevention and control of influenza. Methods The monitoring data and pathogen detection results of influenza-like illness （ILl） from Nanning Sentinel Hospital at national level were collected for analysis through National Influenza Surveillance Network. Results The average proportion of ILI in Nanning from 2009 to 2013 was 18.5% , and most cases were children aged 〈 15 years. Of total 6 048 nasopharyngeal swab samples, 1 118（18.5%） were positive for influenza virus, and 471 swine-origin influenza A H1N1 virus, 22 positive for influenza A （H1N1） virus, 289 influenza A （H3N2） virus and 336 positive for influenza B virus. The swine-origin influenza A H1N1 virus and influenza A （H3N2） virus circulated simultaneously in 2009, influenza B virus, swine-origin influenza A H1N1 virus and influenza A （H3N2） virus circulated simultaneously in 2010, swine-origin influenza A H1N1 virus predominated circulation in 2011, influenza B virus and influenza A （H3N2） virus circulated simuhaneous]y in 2012, swine-origin influenza A H1N1 virus and influenza B virus circulated simultaneously in 2013. Conclusion The epidmic influenza strains were influenza H1N1 viruse, influenza A H3 virus and influnenza B virus, and the annual predominate strains of influenza changed alternatively. People aged 〈 15 years were susceptible to influenza virus.