Bidirectional Movement of Emerging H5N8 Avian Influenza Viruses Between Europe and Asia via Migratory Birds Since Early 2020

Author:

Zhang Guogang1,Li Bingying2,Raghwani Jayna34ORCID,Vrancken Bram56ORCID,Jia Ru1,Hill Sarah C4,Fournié Guillaume4,Cheng Yanchao2,Yang Qiqi7,Wang Yuxin2,Wang Zengmiao2,Dong Lu8ORCID,Pybus Oliver G34ORCID,Tian Huaiyu2

Affiliation:

1. Key Laboratory of Forest Protection of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, National Bird Banding Center of China , Beijing , China

2. State Key Laboratory of Remote Sensing Science, Center for Global Change and Public Health, College of Global Change and Earth System Science, Beijing Normal University , Beijing , China

3. Department of Biology, University of Oxford , Oxford , United Kingdom

4. Department of Pathobiology and Population Sciences, The Royal Veterinary College , London , United Kingdom

5. Department of Microbiology and Immunology, Rega Institute, Laboratory of Evolutionary and Computational Virology, KU Leuven , Leuven , Belgium

6. Spatial Epidemiology Lab (SpELL), Université Libre de Bruxelles , Bruxelles , Belgium

7. Department of Ecology and Evolutionary Biology, Princeton University , Princeton, NJ , USA

8. Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering, College of Life Sciences, Beijing Normal University , Beijing , China

Abstract

Abstract Migratory birds play a critical role in the rapid spread of highly pathogenic avian influenza (HPAI) H5N8 virus clade 2.3.4.4 across Eurasia. Elucidating the timing and pattern of virus transmission is essential therefore for understanding the spatial dissemination of these viruses. In this study, we surveyed >27,000 wild birds in China, tracked the year-round migration patterns of 20 bird species across China since 2006, and generated new HPAI H5N8 virus genomic data. Using this new data set, we investigated the seasonal transmission dynamics of HPAI H5N8 viruses across Eurasia. We found that introductions of HPAI H5N8 viruses to different Eurasian regions were associated with the seasonal migration of wild birds. Moreover, we report a backflow of HPAI H5N8 virus lineages from Europe to Asia, suggesting that Europe acts as both a source and a sink in the global HPAI virus transmission network.

Publisher

Oxford University Press (OUP)

Subject

Genetics,Molecular Biology,Ecology, Evolution, Behavior and Systematics

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