North American wintering mallards infected with highly pathogenic avian influenza show few signs of altered local or migratory movements.

Autor: Teitelbaum CS; Akima Systems Engineering, Herndon, VA, USA. claire.teitelbaum@gmail.com.; Contractor to U.S. Geological Survey, Eastern Ecological Science Center, Laurel, MD, USA. claire.teitelbaum@gmail.com.; Bay Area Environmental Research Institute and NASA Ames Research Center, Moffett Field, CA, USA. claire.teitelbaum@gmail.com., Masto NM; College of Arts and Sciences, Tennessee Technological University, Cookeville, TN, USA., Sullivan JD; U.S. Geological Survey, Eastern Ecological Science Center, Laurel, MD, USA., Keever AC; College of Arts and Sciences, Tennessee Technological University, Cookeville, TN, USA., Poulson RL; Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, USA., Carter DL; Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA, USA., Blake-Bradshaw AG; College of Arts and Sciences, Tennessee Technological University, Cookeville, TN, USA., Highway CJ; College of Arts and Sciences, Tennessee Technological University, Cookeville, TN, USA., Feddersen JC; Tennessee Wildlife Resources Agency, Nashville, TN, USA., Hagy HM; U.S. Fish and Wildlife Service, National Wildlife Refuge System, Stanton, TN, USA., Gerhold RW; University of Tennessee College of Veterinary Medicine, Knoxville, TN, USA., Cohen BS; College of Arts and Sciences, Tennessee Technological University, Cookeville, TN, USA., Prosser DJ; U.S. Geological Survey, Eastern Ecological Science Center, Laurel, MD, USA.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Sep 02; Vol. 13 (1), pp. 14473. Date of Electronic Publication: 2023 Sep 02.
DOI: 10.1038/s41598-023-40921-z
Abstrakt: Avian influenza viruses pose a threat to wildlife and livestock health. The emergence of highly pathogenic avian influenza (HPAI) in wild birds and poultry in North America in late 2021 was the first such outbreak since 2015 and the largest outbreak in North America to date. Despite its prominence and economic impacts, we know relatively little about how HPAI spreads in wild bird populations. In January 2022, we captured 43 mallards (Anas platyrhynchos) in Tennessee, USA, 11 of which were actively infected with HPAI. These were the first confirmed detections of HPAI H5N1 clade 2.3.4.4b in the Mississippi Flyway. We compared movement patterns of infected and uninfected birds and found no clear differences; infected birds moved just as much during winter, migrated slightly earlier, and migrated similar distances as uninfected birds. Infected mallards also contacted and shared space with uninfected birds while on their wintering grounds, suggesting ongoing transmission of the virus. We found no differences in body condition or survival rates between infected and uninfected birds. Together, these results show that HPAI H5N1 clade 2.3.4.4b infection was unrelated to body condition or movement behavior in mallards infected at this location during winter; if these results are confirmed in other seasons and as HPAI H5N1 continues to evolve, they suggest that these birds could contribute to the maintenance and dispersal of HPAI in North America. Further research on more species across larger geographic areas and multiple seasons would help clarify potential impacts of HPAI on waterfowl and how this emerging disease spreads at continental scales, across species, and potentially between wildlife and domestic animals.
(© 2023. Springer Nature Limited.)
Databáze: MEDLINE
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