汉坦病毒基因分型和应用重组抗原进行HFRS抗体快速检测的研究
发布时间:2019-01-03 08:14
【摘要】:本研究使用RT-nested PCR分型检测方法及核苷酸序列测定技术,对来源于福建省内HFRS监测点的鼠肺标本及病人血清进行基因分型并对部分标本的核苷酸序列进行分析比较。RT-PCR分型检测结果显示:24份阳性鼠肺标本中检出率为95.8%;20份病人血清标本中仅11份扩增阳性,检出率分别为:83%(≤1周),12.5%(1周)。扩增阳性标本中仅1份RT-PCR分型为HTN型,其余均为SEO型,这与核苷酸序列分型结果相一致。表明近年福建省流行的汉坦病毒仍以SEO型为主。核酸序列比较分析发现,福建省内同一地区流行的SEO型汉坦病毒核苷酸的同源性很高,大于99%,而不同地区病毒间核酸序列变异比较大,尤其是永春和松溪这两个地区的毒株差异达到20%左右,可能是SEO型中两个新的亚型。 在E.coli中表达汉坦病毒A_(537)株NP重组抗原,采用电洗脱、亲和层析等方法纯化重组蛋白,纯化的重组蛋白e112直接包被聚乙烯96孔板,用于间接法ELISA检测HFRS患者血清中IgG抗体,与IFAT比较,其敏感性和特异性分别为94.7%、95.6%,适用于大规模的流行病学调查;或以胶体金标记重组抗原,运用金标快速免疫层析法可同时检测HFRS患者血清中IgM和IgG抗体,与IFAT/ELISA比较,其敏感性和特异性分别为97.9%、98.2%,具有简便、快速等优点,适用于各种层次尤其是基层医疗单位、农村卫生院等缺乏实验条件和专业人员的地方对HFRS疑似患者作出早期诊断。
[Abstract]:In this study, RT-nested PCR typing and nucleotide sequencing were used. The genotyping of rat lung and patient serum from HFRS monitoring sites in Fujian province was carried out and the nucleotide sequences of some samples were analyzed and compared. The results of RT-PCR typing showed that the detection rate of 24 positive rat lung samples was 95.8%. The positive rate of amplification was 83% (鈮,
本文编号:2399107
[Abstract]:In this study, RT-nested PCR typing and nucleotide sequencing were used. The genotyping of rat lung and patient serum from HFRS monitoring sites in Fujian province was carried out and the nucleotide sequences of some samples were analyzed and compared. The results of RT-PCR typing showed that the detection rate of 24 positive rat lung samples was 95.8%. The positive rate of amplification was 83% (鈮,
本文编号:2399107
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