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Updated: May 28, 2026

Rapid Diagnosis of Avian Influenza Virus in Wild Birds: Use of a Portable rRT-PCR and Freeze-dried Reagents in the Field
Published on: August 2, 2011
Host-Pathogen Network and Eco-Evolutionary Drivers of Avian Influenza Transmission in Wild Birds
Xinyi Wang1,2,3, Zhi Ling3, Xiaocan Chen1
1MOE Key Laboratory for Biodiversity Science and Ecological Engineering, College of Life Sciences, Beijing Normal University, Beijing, China.
Abstract:
Multi-host pathogens vary in how they utilise different hosts, yet the traits determining which species occupy central positions in transmission networks remain poorly understood. We tested whether the wild bird-avian influenza virus (AIV) network exhibits a scale-free structure, implying that hub hosts disproportionately contribute to transmission and whether ecological and evolutionary traits jointly predict hub status. Using global infection records, we constructed a bipartite network linking 247 bird species to 105 AIV subtypes. Degree distributions followed a power-law pattern, confirming substantial heterogeneity in host importance. We identified 23 hub species, exclusively from Anseriformes and Charadriiformes. Interpretable machine learning revealed that hub species share strong flightability, prolonged water-surface foraging, greater longevity and higher diversification rates, indicating that both ecological exposure and evolutionary history influence hub status. These findings provide insight into host-pathogen network dynamics and highlight priority species for targeted AIV surveillance and control.
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