重庆市渝中区2011-2012年2所流感哨点监测医院流感样病例监测结果分析

目的对重庆市渝中区流行性感冒（流感）哨点监测结果进行分析,为制定流感防控工作策略提供依据和参考。方法通过2所流感哨点监测医院对重庆市渝中区2011～2012年流感样病例（ILI）进行监测,对部分ILI采集标本进行病毒分离及鉴定。结果2所哨点监测医院监测ILl分别占监测诊室病例总数的0．45％（2193／491231）、2．44％（12742／521876）。监测的ILI比例儿童高于成年人,差异有统计学意义（P〈0．01）,15岁以下ILI占85．53％（12774／14935）。2个监测年度A、B型标本构成比较,差异均有统计学意义（P〈0．01）。2011年和2012年流感病毒阳性检出率分别为12．40％（106／855）和19．22％（248／1290）,2012年阳性栓出率高于2011年,差异有统计学意义（P〈0．01）。结论儿童和青少年是重点防控人群,优势毒株会交替出现,特别是每年2—3月份是毒株更替时期。应对学校、幼儿园的疫情进行重点关注。

Analysis of monitoring results on influenza-like illness in two hospitals of influenza surveillance in Yuzhong district of Chongqing during 2011 and 2012

Objective To analyze the monitoring results of influenza in sentinel surveillance in Yuzhong district in Chongqing,in order to provide basis and reference for the prevention and control of influenza. Methods Through the surveillance on influenza-like illness （ILI） in two hospitals during 2011 and 2012 in Yuzhong district of Chongqing, parts of ILI collected specimen were with virus isolation and identification. Results The monitoring ILI in the two sentinel surveillance hospitals accounted for 0.45% （2 193/491 231 ） and 2.44% （ 12 742/521 876） respectively of the total number of monitoring cases. The pro portion of children was higher than that of adult among monitoring ILI, the difference had statistical significance （P〈0.01）. The children with ILI under 15 years old accounted for 85.53% （12 774/14 935） of all the ILL The difference of annual type A and type B specimen constitute between the 2 monitoring years had statistical significance （P〈0.01）. The positive rate was 12.40% （106/ 855 ） in 2011 and 19.22% （248/1 290） in 2012, and the latter was higher than the former with statistically significant difference （P〈0.01）. Conclusion The children and adolescents are the focus of prevention and control groups, the dominant strain will appear alternately, especially the February and March are replacement period of strains, so it is necessary to focus on the epidemic situation in schools and kindergartens.