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Avian influenza in Australia: a summary of 5 years of wild bird surveillance

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Grillo, V., Arzey, K., Hansbro, P., Hurt, A., Warner, S., Bergfeld, J., Burgess, G., Cookson, B., Dickason, C., Ferenczi, M., Hollingsworth, T., Hoque, M., Jackson, R., Klaassen, M., Kirkland, P., Kung, N., Lisovski, S., O'Dea, M., O'Riley, K., Roshier, D., Skerratt, L., Tracey, J., Wang, X., Woods, R. and Post, L. (2015) Avian influenza in Australia: a summary of 5 years of wild bird surveillance. Australian Veterinary Journal, 93 (11). pp. 387-393. ISSN 00050423

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Article Link: http://dx.doi.org/10.1111/avj.12379

Abstract

BackgroundAvian influenza viruses (AIVs) are found worldwide in numerous bird species, causing significant disease in gallinaceous poultry and occasionally other species. Surveillance of wild bird reservoirs provides an opportunity to add to the understanding of the epidemiology of AIVs. MethodsThis study examined key findings from the National Avian Influenza Wild Bird Surveillance Program over a 5-year period (July 2007-June 2012), the main source of information on AIVs circulating in Australia. ResultsThe overall proportion of birds that tested positive for influenza A via PCR was 1.90.1%, with evidence of widespread exposure of Australian wild birds to most low pathogenic avian influenza (LPAI) subtypes (H1-13, H16). LPAI H5 subtypes were found to be dominant and widespread during this 5-year period. ConclusionGiven Australia's isolation, both geographically and ecologically, it is important for Australia not to assume that the epidemiology of AIV from other geographic regions applies here. Despite all previous highly pathogenic avian influenza outbreaks in Australian poultry being attributed to H7 subtypes, widespread detection of H5 subtypes in wild birds may represent an ongoing risk to the Australian poultry industry.

Item Type:Article
Business groups:Biosecurity Queensland
Keywords:Australia avian influenza biosecurity surveillance wild birds A-VIRUS DIAGNOSTIC-TESTS AQUATIC BIRDS H5N1 EPIDEMIOLOGY PERSPECTIVE EVOLUTION WATERFOWL ECOLOGY RISK Veterinary Sciences
Subjects:Animal culture > Poultry
Veterinary medicine > Veterinary virology
Veterinary medicine > Diseases of special classes of animals > Avian
Live Archive:01 Jun 2016 06:39
Last Modified:03 Sep 2021 16:50

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