Published sequences do not support transfer of oseltamivir resistance mutations from avian to human influenza A virus strains

BMC Infectious Diseases

Research Article

Sigvard Olofsson¹  Magnus Lindh¹  Peter Norberg¹ 

[1] Department of Infectious Diseases and Virology, Sahlgrenska Academy, University of Göteborg, Guldhedsgatan 10 B, S-413 46, Gothenburg, Sweden;

关键词: Influenza A;    Avian influenza;    Tamiflu;    Oseltamivir resistance;    Resistance mutations;   

DOI  :  10.1186/s12879-015-0860-9

 received in 2014-08-12, accepted in 2015-02-26,  发布年份 2015

来源: Springer

【 摘 要 】

BackgroundTamiflu (oseltamivir phosphate ester, OE) is a widely used antiviral active against influenza A virus. Its active metabolite, oseltamivir carboxylate (OC), is chemically stable and secreted into wastewater treatment plants. OC contamination of natural habitats of waterfowl might induce OC resistance in influenza viruses persistently infecting waterfowl, and lead to transfer of OC-resistance from avian to human influenza. The aim of this study was to evaluate whether such has occurred.MethodsA genomics approach including phylogenetic analysis and probability calculations for homologous recombination was applied on altogether 19,755 neuraminidase (N1 and N2) genes from virus sampled in humans and birds, with and without resistance mutations.ResultsNo evidence for transfer of OE resistance mutations from avian to human N genes was obtained, and events suggesting recombination between human and avian influenza virus variants could not be traced in the sequence material studied.ConclusionsThe results indicate that resistance in influenza viruses infecting humans is due to the selection pressure posed by the global OE administration in humans rather than transfer from avian influenza A virus strains carrying mutations induced by environmental exposure to OC.

【 授权许可】

CC BY   
© Norberg et al.; licensee BioMed Central. 2015