Swine influenza viruses isolated in 1983, 2002 and 2009 in Sweden exemplify different lineages

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Abstract

Swine influenza virus isolates originating from outbreaks in Sweden from 1983, 2002 and 2009 were subjected to nucleotide sequencing and phylogenetic analysis. The aim of the studies was to obtain an overview on their potential relatedness as well as to provide data for broader scale studies on swine influenza epidemiology. Nonetheless, analyzing archive isolates is justified by the efforts directed to the comprehension of the appearance of pandemic H1N1 influenza virus. Interestingly, this study illustrates the evolution of swine influenza viruses in Europe, because the earliest isolate belonged to 'classical' swine H1N1, the subsequent ones to Eurasian 'avian-like' swine H1N1 and reassortant 'avian-like' swine H1N2 lineages, respectively. The latter two showed close genetic relatedness regarding their PB2, HA, NP, and NS genes, suggesting common ancestry. The study substantiates the importance of molecular surveillance for swine influenza viruses. © 2010 Kiss et al; licensee BioMed Central Ltd.

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Kiss, I., Bálint, Á., Metreveli, G., Emmoth, E., Widén, F., Belák, S., & Wallgren, P. (2010). Swine influenza viruses isolated in 1983, 2002 and 2009 in Sweden exemplify different lineages. Acta Veterinaria Scandinavica, 52(1). https://doi.org/10.1186/1751-0147-52-65

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