Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/22002
Title: Avian influenza infection dynamics under variable climatic conditions, viral prevalence is rainfall driven in waterfowl from temperate, south-east Australia
Contributor(s): Ferenczi, Marta (author); Beckmann, Christa  (author)orcid ; Warner, Simone (author); Loyn, Richard (author); O'Riley, Kim (author); Wang, Xinlong (author); Klaassen, Marcel (author)
Publication Date: 2016
Open Access: Yes
DOI: 10.1186/s13567-016-0308-2Open Access Link
Handle Link: https://hdl.handle.net/1959.11/22002
Abstract: Understanding Avian Influenza Virus (AIV) infection dynamics in wildlife is crucial because of possible virus spill over to livestock and humans. Studies from the northern hemisphere have suggested several ecological and environmental drivers of AIV prevalence in wild birds. To determine if the same drivers apply in the southern hemisphere, where more irregular environmental conditions prevail, we investigated AIV prevalence in ducks in relation to biotic and abiotic factors in south-eastern Australia. We sampled duck faeces for AIV and tested for an effect of bird numbers, rainfall anomaly, temperature anomaly and long-term ENSO (El-Nino Southern Oscillation) patterns on AIV prevalence. We demonstrate a positive long term effect of ENSO-related rainfall on AIV prevalence. We also found a more immediate response to rainfall where AIV prevalence was positively related to rainfall in the preceding 3-7 months. Additionally, for one duck species we found a positive relationship between their numbers and AIV prevalence, while prevalence was negatively or not affected by duck numbers in the remaining four species studied. In Australia largely non-seasonal rainfall patterns determine breeding opportunities and thereby influence bird numbers. Based on our findings we suggest that rainfall influences age structures within populations, producing an influx of immunologically naive juveniles within the population, which may subsequently affect AIV infection dynamics. Our study suggests that drivers of AIV dynamics in the northern hemisphere do not have the same influence at our south-east Australian field site in the southern hemisphere due to more erratic climatological conditions.
Publication Type: Journal Article
Source of Publication: Veterinary Research, v.47, p. 1-12
Publisher: BioMed Central Ltd
Place of Publication: United Kingdom
ISSN: 0928-4249
1297-9716
Field of Research (FOR): 060899 Zoology not elsewhere classified
060801 Animal Behaviour
060804 Animal Immunology
Socio-Economic Outcome Codes: 970106 Expanding Knowledge in the Biological Sciences
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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Appears in Collections:Journal Article
School of Environmental and Rural Science

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