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Erschienen in:

14.03.2016 | Original Article

Phylogenetic analysis of human influenza A/H3N2 viruses isolated in 2015 in Germany indicates significant genetic divergence from vaccine strains

verfasst von: Ahmed Mostafa, El-Sayed M. Abdelwhab, Heiko Slanina, Mohamed A. Hussein, Irina Kuznetsova, Christian G. Schüttler, John Ziebuhr, Stephan Pleschka

Erschienen in: Archives of Virology | Ausgabe 6/2016

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Abstract

Infections by H3N2-type influenza A viruses (IAV) resulted in significant numbers of hospitalization in several countries in 2014-2015, causing disease also in vaccinated individuals and, in some cases, fatal outcomes. In this study, sequence analysis of H3N2 viruses isolated in Germany from 1998 to 2015, including eleven H3N2 isolates collected early in 2015, was performed. Compared to the vaccine strain A/Texas/50/2012 (H3N2), the 2015 strains from Germany showed up to 4.5 % sequence diversity in their HA1 protein, indicating substantial genetic drift. The data further suggest that two distinct phylogroups, 3C.2 and 3C.3, with 1.6-2.3 % and 0.3-2.4 % HA1 nucleotide and amino acid sequence diversity, respectively, co-circulated in Germany in the 2014/2015 season. Distinct glycosylation patterns and amino acid substitutions in the hemagglutinin and neuraminidase proteins were identified, possibly contributing to the unusually high number of H3N2 infections in this season and providing important information for developing vaccines that are effective against both genotypes.

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Titel: Phylogenetic analysis of human influenza A/H3N2 viruses isolated in 2015 in Germany indicates significant genetic divergence from vaccine strains
verfasst von: Ahmed Mostafa
El-Sayed M. Abdelwhab
Heiko Slanina
Mohamed A. Hussein
Irina Kuznetsova
Christian G. Schüttler
John Ziebuhr
Stephan Pleschka
Publikationsdatum: 14.03.2016
Verlag: Springer Vienna
Erschienen in: Archives of Virology / Ausgabe 6/2016
Print ISSN: 0304-8608
Elektronische ISSN: 1432-8798
DOI: https://doi.org/10.1007/s00705-016-2815-x

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