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Frequency and patterns of reassortment in natural influenza A virus infection in a reservoir host
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2013 (English)In: Virology, ISSN 0042-6822, E-ISSN 1096-0341, Vol. 443, no 1, 150-160 p.Article in journal (Refereed) Published
Abstract [en]

Influenza A viruses (IAV) can dramatically alter both genotype and phenotype at a rapid rate as a product of co-infection and reassortment Avian IAV exhibit high levels of phylogenetic incongruence, suggesting high levels of reassortment in the virus reservoir. Using a natural-experimental system, we reconstructed relationships amongst 92 viruses across 15 subtypes from 10 Mallards in an autumn season. Phylogenetic analyses estimated that 56% of the isolated viruses were reassorted. Network analysis demonstrated different patterns of reassortment and limited exchange of segments between primary and secondary infections. No clear patterns of linkage between segments were found, and patterns within a season were likely the consequence of continued introduction of new constellations, high viral load and diversity in the wild bird reservoir, and co-infections. This is the first IAV study to implement multiple tools available for elucidating factors governing reassortment patterns in naturally infected Mallards.

Place, publisher, year, edition, pages
2013. Vol. 443, no 1, 150-160 p.
Keyword [en]
Anas platyrhynchos, Evolution, Influenza A virus, Mallard, Reassortment, Sentinel ducks
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-206557DOI: 10.1016/j.virol.2013.05.004ISI: 000322289900017OAI: oai:DiVA.org:uu-206557DiVA: diva2:644938
Available from: 2013-09-02 Created: 2013-09-02 Last updated: 2014-01-09Bibliographically approved

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Olsen, Björn
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