2010年北京市不同地区儿童甲3亚型流行性感冒暴发疫情的病原学分析  

Etiological analysis of two outbreaks of influenza H3N2 among children in Beijing in 2010

作　　者：卢桂兰[1] 张代涛[1] 刘医萌[1] 吴占国[2] 任淑敏[3] 梁慧洁[1] 张莉[1] 吴双胜[1] 杨鹏[1] 

机构地区：[1]北京市疾病预防控制中心传染病地方病控制所,北京100013 [2]北京市大兴区疾病预防控制中心,北京102600 [3]北京市延庆县疾病预防控制中心,北京102100

出　　处：《中国卫生检验杂志》2012年第5期968-970,973,共4页Chinese Journal of Health Laboratory Technology

摘　　要：目的:对2010年北京市某两区发生的儿童甲3亚型流行性感冒暴发疫情进行病原学研究。方法:荧光RT-PCR方法检测疫情患者标本,对核酸阳性者进行病毒培养;对毒株血凝素HA1基因进行序列比对和进化分析。结果:两起疫情标本甲3亚型流感病毒核酸阳性检出共14件;毒株共分离到6株。各疫情毒株同源性序列为100%;两起疫情的HA1序列同源性为97.3%。与疫苗株A/Perth/16/2009(H3N2)比较,其中疫情2分离株共有8个氨基酸(aa)变异。结论:两起疫情均为甲3亚型(H3N2)流感所致;同一起疫情均由同一病毒株传播所致;两起疫情甲3亚型(H3N2)毒株的血凝素HA1区存在不同程度的aa变异。Objective：To conduct the etiological analysis of two outbreaks of H3N2 influenza in different areas of Beijing.Methods： Nasopharyngeal swab specimens were collected and tested for influenza virus by real time RT-PCR.Positive specimens were isolated for cell culture.Furthermore,hemagglutin subunit（HA1） genes were amplified,sequenced and aligned with A/Perth/16/2009（H3N2）.Results： The etiology of these two outbreaks was H3N2 virus,with a total of fourteen positive specimens by real time RT-PCR.In addition,a total of six virus strains were isolated.HA1 sequences analysis showed that every outbreak was caused by the same virus strain.Compared with the sequence of A/Perth/16/2009（H3N2）,the virus strains from outbreak 2 had eight amino acid mutations.Conclusion： These two outbreaks were caused by H3N2 virus.Furthermore,amino acid mutations were found in HA1 region of the virus strains with different degrees.

关 键 词：流行性感冒 暴发疫情 病原学分析 

分 类 号：R373.13[医药卫生—病原生物学]