This invention discloses PCR primers and probes for detecting ILT live
vaccine virus and wild-type
virus. The primers include a universal upstream primer: 5'-GCACAAAGTCCAAATCTTCT-3' and a universal downstream primer: 5'-TCAATCACAGACGGTACTTTC-3'. The probes include a
vaccine virus-specific probe: 5'-FAM-CAAGTTGATGAATATGCTCAC-MGB-3' and a wild-type
virus-specific probe: 5'-ROX-CAAGTTGATGAATGTGCTCA-MGB-3'. The 5' end of the
vaccine virus probe is labeled with the FAM fluorescent group, and the 5' end of the wild-type
virus probe is labeled with the ROX fluorescent group. The 3' ends of both probes are labeled with the MGB quencher group. Using these primers and probes, ILT live vaccine virus and wild-type virus can be detected and distinguished rapidly and accurately, and can be used for epidemic monitoring in farms.