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Birds and viruses at a crossroad: surveillance of influenza a virus in portuguese waterfowl
Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
Instituto Politécnico de Coimbra, Portugal.
Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
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2012 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 7, no 11, e49002Article in journal (Refereed) Published
Abstract [en]

During recent years, extensive amounts of data have become available regarding influenza A virus (IAV) in wild birds in northern Europe, while information from southern Europe is more limited. Here, we present an IAV surveillance study conducted in western Portugal 2008-2009, analyzing 1653 samples from six different species of waterfowl, with the majority of samples taken from Mallards (Anas platyrhynchos). Overall 4.4% of sampled birds were infected. The sampling results revealed a significant temporal variation in the IAV prevalence, including a pronounced peak among predominantly young birds in June, indicating that IAV circulate within breeding populations in the wetlands of western Portugal. The H10N7 and H9N2 subtypes were predominant among isolated viruses. Phylogenetic analyses of the hemagglutinin and neuraminidase sequences of H10N7, H9N2 and H11N3 virus showed that sequences from Portugal were closely related to viral sequences from Central Europe as well as to IAVs isolated in the southern parts of Africa, reflecting Portugal's position on the European-African bird migratory flyway. This study highlights the importance of Portugal as a migratory crossroad for IAV, connecting breeding stationary waterfowl with birds migrating between continents which enable transmission and spread of IAV.

Place, publisher, year, edition, pages
2012. Vol. 7, no 11, e49002
National Category
Biological Sciences
Research subject
Ecology, Zoonotic Ecology
Identifiers
URN: urn:nbn:se:lnu:diva-22800DOI: 10.1371/journal.pone.0049002PubMedID: 23145046OAI: oai:DiVA.org:lnu-22800DiVA: diva2:576312
Available from: 2012-12-12 Created: 2012-12-12 Last updated: 2016-07-20Bibliographically approved

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Tolf, ConnyBengtsson, DanielLatorre-Margalef, NeusWille, MichelleOlsen, BjörnWaldenström, Jonas
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CiteExportLink to record
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Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
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  • de-DE
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  • en-US
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  • Other locale
More languages
Output format
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