NDLI: Birds and Viruses at a Crossroad - Surveillance of Influenza A Virus in Portuguese Waterfowl

Content Provider	PubMed Central
Author	Conny, Tolf Bengtsson, Daniel Rodrigues, David Latorre-margalef, Neus Wille, Michelle Figueiredo, Maria Ester Monika, Jankowska-hjortaas Anna, Germundsson Duby, Pierre-yves Camille, Lebarbenchon Michel, Gauthier-clerc Olsen, Björn Jonas, Waldenström
Editor	Kaltenboeck, Bernhard
Copyright Year	2012
Abstract	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.
Related Links	http://dx.doi.org/10.1371/journal.pone.0049002
Starting Page	49002
File Format	PDF
ISSN	19326203
e-ISSN	19326203
Journal	PLoS ONE
Issue Number	11
Volume Number	7
Language	English
Publisher	Public Library of Science
Publisher Date	2012-11-01
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Agricultural and Biological Sciences(all) Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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