In order to simultaneously and massively identify the avian influenza virus subtypes of H5,H7 and H9 which are pathogenic and dangerous,H5,H7 and H9 hemagglutinin subtype-specific Taqman MGB probe marked with three different primer sets were developed based on all avian influenza virus HA sequences published in GenBank.A multiplex real-time reverse transcriptase PCR(RRT-PCR) assay was developed for the rapid detection of subtypes H5,H7 and H9 of avian influenza virus.The multiplex RRT-PCR assay was specific...