岳阳市2009年-2012年流行性感冒监测结果分析

Analysis of influenza monitoring results in Yueyang from 2009 to 2012

目的了解岳阳市2009年-2012年流行性感冒的流行概况,为流感的防控提供科学依据。方法每周统计哨点医院流感样病例（ILI）,采集ILI鼻咽拭子标本,采用Real time RT-PCR和MDCK细胞病毒分离及血凝及血凝抑制试验进行病毒检测和分型。结果流感样病例百分率分别为11.52%、4.03%、7.49%和8.10%,ILI年龄段集中在0-岁和5-岁年龄组,共检测ILI鼻咽拭子标本1871份,检出率为30.79%,2009年优势毒株为H3和H1N1,2010年-2011年为B型,2012年为H3和B型。结论岳阳市2009年-2010年出现新甲型H1N1流感暴发,2010年-2012年全年疫情呈散发、低发流行;各年的优势毒株有差异,实行网络监测对科学防控流感十分必要。

Objective To understand the epidemiological characteristics of influenza in Yueyang from 2009 to 2012,so as to provide scientific basis for prevention and control of influenza. Methods The throat swab specimens were collected from influenza-like illness（ ILI） in sentinel hospital weekly to detect the influenza virus by Real time RT-PCR,and the influenza virus was isolated with MDCK cells,identified by hemaggutination inhibition test（ HI）. Results The proportions of ILI were 11. 52%,4. 03%,7. 49% and 8. 10% respectively from 2009 to 2012,and the ILI were mainly found in two age groups（ 0 - 4 years old and 5 - 14 years old）. A total of 1871 throat swab specimens were tested and the positive rate was 30. 79%. Influenza A（ H3） and influenza A（ H1N1） were dominant viral strains in 2009,influenza B was dominant from 2010 to 2011,while influenza A（ H3） and influenza B were popular in 2012. Conclusion The outbreak of influenza A（ H1N1） was from 2009 to 2010,while sporadic and low-epidemic from 2010 to 2012. The dominant viral strains were different in the 4 years,so it is very necessary to conduct network monitoring for prevention and control of influenza.