Ecosystem Interactions Underlie the Spread of Avian Influenza A Viruses with Pandemic Potential.

TitleEcosystem Interactions Underlie the Spread of Avian Influenza A Viruses with Pandemic Potential.
Publication TypeJournal Article
Year of Publication2016
AuthorsBahl J, Pham TT, Hill NJ, Hussein ITM, Ma EJ, Easterday BC, Halpin RA, Stockwell TB, Wentworth DE, Kayali G, Krauss S, Schultz-Cherry S, Webster RG, Webby RJ, Swartz MD, Smith GJD, Runstadler JA
JournalPLoS Pathog
Volume12
Issue5
Paginatione1005620
Date Published2016 May
ISSN1553-7374
Abstract

<p>Despite evidence for avian influenza A virus (AIV) transmission between wild and domestic ecosystems, the roles of bird migration and poultry trade in the spread of viruses remain enigmatic. In this study, we integrate ecosystem interactions into a phylogeographic model to assess the contribution of wild and domestic hosts to AIV distribution and persistence. Analysis of globally sampled AIV datasets shows frequent two-way transmission between wild and domestic ecosystems. In general, viral flow from domestic to wild bird populations was restricted to within a geographic region. In contrast, spillover from wild to domestic populations occurred both within and between regions. Wild birds mediated long-distance dispersal at intercontinental scales whereas viral spread among poultry populations was a major driver of regional spread. Viral spread between poultry flocks frequently originated from persistent lineages circulating in regions of intensive poultry production. Our analysis of long-term surveillance data demonstrates that meaningful insights can be inferred from integrating ecosystem into phylogeographic reconstructions that may be consequential for pandemic preparedness and livestock protection.</p>

DOI10.1371/journal.ppat.1005620
Alternate JournalPLoS Pathog.
PubMed ID27166585
PubMed Central IDPMC4864295