RT-PCR对青岛市小学生乙型流感病毒Victoria系暴发的检测

目的分析青岛地区乙型流感暴发的流行病学特征,探讨RT-PCR方法对乙型流感病毒暴发的诊断价值,并对疫情控制措施做出评价。方法采集暴发性疫情流感样病例的咽拭子,采用QIAGEN试剂盒提取病毒RNA,RT-PCR方法分别扩增甲型和乙型流感病毒核酸的特异片段,然后,对核酸检测阳性标本采用狗肾传代细胞(MDCK)细胞培养,红细胞凝集抑制试验对培养的病毒进行鉴定和分型。结果采集的18份咽拭子中15份乙型流感病毒核酸检测呈阳性,但甲型流感病毒未检出;15份乙型流感病毒核酸阳性标本经MDCK细胞培养,9份标本发生细胞病变,经鉴定和分型,毒株均属于乙型流感病毒Victoria系。结论 RT-PCR方法对乙型流感病毒暴发的检测具有快速、敏感和高度特异性的特点,WHO推荐的2008-2009年流感疫苗成分中乙型流感病毒株(B/Florida/4/2006)为Yamagata系,而青岛地区暴发的流感为乙型流感病毒Victoria系,提示在今后决定我国疫苗成分时是否应考虑地区流行的特点。

Detection of influenza B virus victoria lineages outbreaks in primary school students in Qingdao city by real-time PCR

OBJECTIVE To analyze the epidemiological characteristics of the influenza B outbreaks in Qingdao city,and evaluate real-time PCR assays for accurate diagnosis of influenza B virus outbreaks and the control measures against this outbreaks.METHODS The swallow swabs were collected from the influenza-like cases of suspected influenza outbreaks in five primary schools of Qingdao city.The viral RNA was extracted(QIAGEN,RNeasy Mini Kit) to amplify the specific regions of influenza A and B virues by RT-PCR,respecti...