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据GenBank登录的高、低致病性猪繁殖与呼吸综合征病毒(highly and lowly pathogenic porcine reproductive and respiratory syndrome virus,HP/LP-PRRSV)的非结构蛋白2(Nsp2)基因序列设计特异性引物和TaqMan MGB荧光探针,经优化反应条件,建立鉴别HP/LP-PRRSV二重TaqMan MGB实时荧光定量RT-PCR(Real-time fluorescent quantitative RT-PCR)检测方法