期刊论文详细信息
Virology Journal
Detection of highly pathogenic zoonotic influenza virus H5N6 by reverse-transcriptase quantitative polymerase chain reaction
Brian Meehan1  Frank YK Wong1  Chris Morrissy1  Som Walker1  Stacey Valdeter1  Jianning Wang1  Adam J Foord1  Hans G Heine1 
[1] CSIRO Australian Animal Health Laboratory, 5 Portarlington Road, Geelong 3220, VIC, Australia
关键词: PCR;    Clade 2.3.4.4;    H5N6;    Molecular diagnosis;    Reassortant virus;    Avian influenza;    Influenza virus;   
Others  :  1131013
DOI  :  10.1186/s12985-015-0250-3
 received in 2014-10-08, accepted in 2015-01-28,  发布年份 2015
PDF
【 摘 要 】

Background

Variant high pathogenicity avian influenza (HPAI) H5 viruses have recently emerged as a result of reassortment of the H5 haemagglutinin (HA) gene with different neuraminidase (NA) genes, including NA1, NA2, NA5, NA6 and NA8. These viruses form a newly proposed HA clade 2.3.4.4 (previously provisionally referred to as clade 2.3.4.6), and have been implicated in disease outbreaks in poultry in China, South Korea, Laos, Japan and Vietnam and a human fatality in China. There is real concern that this new clade may be wide spread and not readily identified using existing diagnostic algorithms.

Findings

Fluorescent probe based reverse-transcriptase quantitative polymerase chain reaction (RT-qPCR) assays were developed to facilitate the identification of novel clade 2.3.4.4 viruses of H5N6 subtype emerging in Asia. Assays were aimed at the haemagglutinin (HA) gene for clade identification and at the NA gene to identify N6. The HA assay employing a minor groove binder (MGB) probe was able to detect and differentiate A/duck/Laos/XBY004/2014(H5N6) and related influenza A(H5N6) virus isolates belonging to the proposed clade 2.3.4.4 from other H5 HPAI viruses. In addition, an Eurasian N6 assay was able to differentiate N6 from other NA subtypes.

Conclusions

Laos influenza A(H5N6) virus representative of proposed clade 2.3.4.4, was detected and differentiated from viruses in other H5N1 clades using a clade-specific HA RT-qPCR assay whereas the N6-NA subtype was determined by an Eurasian N6 RT-qPCR assay. Such a clade-specific assay would be of particular value for surveillance and in diagnostic laboratories where sequencing is not readily available.

【 授权许可】

   
2015 Heine et al.; licensee BioMed Central.

【 预 览 】
附件列表
Files Size Format View
20150228173808510.pdf 335KB PDF download
【 参考文献 】
  • [1]OIE (2014). Update on highly pathogenic avian influenza in animals (type H5 and H7). [http://www.oie.int/en/animal-health-in-the-world/update-on-avian-influenza/2014/]
  • [2]OIE (2015). Update on highly pathogenic avian influenza in animals (type H5 and H7) [http://www.oie.int/en/animal-health-in-the-world/update-on-avian-influenza/2015/]
  • [3]WHO (2014). WHO China statement on H5N6. [http://www.wpro.who.int/china/mediacentre/releases/2014/20140507/en]
  • [4]Wong FYK, Phommachanh P, Kalpravidh W, Chanthavisouk C, Gilbert J, Bingham J, et al. Emergence of a Reassortant Highly Pathogenic Avian Influenza H5N6 Virus in Lao People‘s Democratic Republic, 2014. Emerg Infect Dis 2015 Mar. [http://dx.doi.org/10.3201/eid2103.141488]
  • [5]Gu M, Zhao G, Zhao K, Zhong L, Huang J, Wan H, et al.: Novel Variants of Clade 2.3.4 Highly Pathogenic Avian Influenza A(H5N1) Viruses, China. Emerg Infect Dis 2013, 19:2021-2024.
  • [6]WHO (2015). Evolution of the influenza A(H5) haemagglutinin: WHO/OIE/FAO H5 Working Group reports a new clade designated 2.3.4.4 [http://www.who.int/influenza/gisrs_laboratory/h5_nomenclature_clade2344/en/]
  • [7]Lee YJ, Kang HM, Lee EK, Song BM, Jeong J, Kwon YK, et al.: Novel reassortant influenza A(H5N8) viruses, South Korea, 2014. Emerg Infect Dis 2014, 20:1087-1089.
  • [8]FAO (2014). Increased concern over latest strain of avian influenza in Southeast Asia. [http://www.fao.org/news/story/en/item/243855/icode/]
  • [9]Altschul SF, Gish W, Miller W, Myers EW, Lipman DJ: Basic local alignment search tool. J Mol Biol 1990, 2153:403-410.
  • [10]Sayers EW, Barrett T, Benson DA, Bolton E, Bryant SH, Canese K, et al.: Database resources of the National Center for Biotechnology Information. Nucleic Acids Res 2012, 40(Database issue):D13-D25.
  • [11]Heine HG, Trinidad L, Selleck P, Lowther S: Rapid Detection of Highly Pathogenic Avian Influenza H5N1 Virus by TaqMan Reverse Transcriptase-Polymerase Chain Reaction. Avian Dis 2007, 51:370-372.
  文献评价指标  
  下载次数:7次 浏览次数:3次