ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (7): 1176-1183.doi: 10.11843/j.issn.0366-6964.2015.07.014

Previous Articles     Next Articles

Visual Detection of H7 and N9 Subtypes Avian Influenza Viruses by Reverse Transcription Loop-mediated Isothermal Amplification Assay

LUO Si-si,XIE Zhi-xun*,XIE Li-ji,DENG Xian-wen,XIE Zhi-qin,HUANG Jiao-ling,ZENG Ting-ting   

  1. (Guangxi Key Laboratory of Animal Vaccines and New Technology,Guangxi Veterinary Research Institute,Nanning 530001,China)
  • Received:2014-10-28 Online:2015-07-23 Published:2015-07-23

Abstract:

A reverse transcription loop-mediated isothermal amplification (RT-LAMP) assay was developed for rapid visual detection of H7 and N9 subtype avian influenza viruses (AIV).According to the conservative sequences of hemagglutinin (HA) and neuraminidase (NA) genes of H7 and N9 subtype AIV in GenBank,two sets of primers were designed,then the reaction conditions were optimized.The specificity and sensitivity of the RT-LAMP assay were evaluated.RT-LAMP amplification was completed in 1 h by incubating all of the reagents in a single tube by real-time turbidimeter at 63 ℃.The specific test demonstrated that the RT-LAMP assay was specific for detecting H7 and N9 subtypes of AIV,and no cross reaction with other subtypes of AIV and avian respiratory pathogens.The detection limit of the RT-LAMP assay was 10 copies using vitro transcription RNA of target genes.The newly developed RT-LAMP assay is specific,sensitive,simple,rapid and can identify H7,N9 and H7N9 subtype AIV visually,and it will be a very useful screening assay for prevention and control these diseases.

CLC Number: