<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Laura Van Poelvoorde</style></author><author><style face="normal" font="default" size="100%">François Dufrasne</style></author><author><style face="normal" font="default" size="100%">Steven Van Gucht</style></author><author><style face="normal" font="default" size="100%">Saelens, Xavier</style></author><author><style face="normal" font="default" size="100%">Nancy Roosens</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Development of Digital Droplet PCR Targeting the Influenza H3N2 Oseltamivir-Resistant E119V Mutation and Its Performance through the Use of Reverse Genetics Mutants.</style></title><secondary-title><style face="normal" font="default" size="100%">Curr Issues Mol Biol</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">INFLUENZA</style></keyword><keyword><style  face="normal" font="default" size="100%">Oseltamivir</style></keyword><keyword><style  face="normal" font="default" size="100%">PCR</style></keyword><keyword><style  face="normal" font="default" size="100%">resistance</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2023</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2023 Mar 17</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">45</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The monitoring of antiviral-resistant influenza virus strains is important for public health given the availability and use of neuraminidase inhibitors and other antivirals to treat infected patients. Naturally occurring oseltamivir-resistant seasonal H3N2 influenza virus strains often carry a glutamate-to-valine substitution at position 119 in the neuraminidase (E119V-NA). Early detection of resistant influenza viruses is important for patient management and for the rapid containment of antiviral resistance. The neuraminidase inhibition assay allows the phenotypical identification of resistant strains; however, this test often has limited sensitivity with high variability depending on the virus strain, drugs and assays. Once a mutation such as E119V-NA is known, highly sensitive PCR-based genotypic assays can be used to identify the prevalence of such mutant influenza viruses in clinical samples. In this study, based on an existing reverse transcriptase real-time PCR (RT-qPCR) assay, we developed a reverse transcriptase droplet digital PCR assay (RT-ddPCR) to detect and quantify the frequency of the E119V-NA mutation. Furthermore, reverse genetics viruses carrying this mutation were created to test the performance of the RT-ddPCR assay and compare it to the standard phenotypic NA assay. We also discuss the advantage of using an RT-ddPCR instead of qPCR method in the context of viral diagnostics and surveillance.&lt;/p&gt;
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