2013 – Recombinant GII.4 noroviruses between the pandemic variants New Orleans 2009 and Sydney 2012, Italy 2012-2013

Analysis of GII.4 NoV strains of the novel variant GII.4 Sydney 2012 circulating in Italy in 2012-2013 identified recombinant strains possessing a polymerase gene derived from the former variant New Orleans 2009. These findings may pose a challenge for the diagnostic/characterization of recent GII.4 NoVs.

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