2022
DOI: 10.1038/s41598-022-04896-7
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Pathology and virology of natural highly pathogenic avian influenza H5N8 infection in wild Common buzzards (Buteo buteo)

Abstract: Highly pathogenic avian influenza (HPAI) in wild birds is a major emerging disease, and a cause of increased mortality during outbreaks. The Common buzzard (Buteo buteo) has a considerable chance of acquiring the infection and therefore may function as bio-sentinel for the presence of virus in wildlife. This study aimed to determine the virus distribution and associated pathological changes in the tissues of Common buzzards that died with HPAI H5 virus infection during the 2020–2021 epizootic. Eleven freshly d… Show more

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Cited by 27 publications
(33 citation statements)
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“…These findings are consistent with lesions reported in naturally and experimentally infected foxes (13,19), domestic cats (20), and a stone marten (5). A similar distribution of lesions has also been reported in raptors with HPAI, with the brain, heart, and lungs being most affected (17,18,21). Notably, pancreatic necrosis was often present in birds of prey but was only present in one red fox in this study.…”
Section: Discussionsupporting
confidence: 91%
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“…These findings are consistent with lesions reported in naturally and experimentally infected foxes (13,19), domestic cats (20), and a stone marten (5). A similar distribution of lesions has also been reported in raptors with HPAI, with the brain, heart, and lungs being most affected (17,18,21). Notably, pancreatic necrosis was often present in birds of prey but was only present in one red fox in this study.…”
Section: Discussionsupporting
confidence: 91%
“…Ingestion of birds infected with HPAIv is presumed to be the most likely source of infection in these wild mammals. Wild birds, including waterfowl, are a typical or occasional component of the natural diet in these mammalian species and infection following ingestion of HPAIv-positive birds has been confirmed in red foxes ( 19 ), domestic dogs ( 24 ), domestic cats ( 25 ), captive felids ( 26 ), and multiple species of raptors and scavenging birds ( 17, 18, 21 ). Furthermore, for some red foxes in this study, there were reports of vixens bringing dead waterfowl to the den, and three red foxes had evidence of bird ingestion at postmortem examination.…”
Section: Discussionmentioning
confidence: 99%
“…The map shows counties with bald eagle H5 IAV mortality (red), as detected by SCWDS and reported on the USDA website from January 1 through May 15, 2022; detections of H5 IAV in dead or hunter-harvested waterfowl (hash lines) as reported on USDA website from January 1 through April 1, 2022; H5 IAV detection or mortality in wild bird species other than bald eagle or waterfowl (yellow border) as detected by SCWDS and reported on USDA website from January 1 through May 15, 2022. Duck silhouettes identify locations with confirmed H5 IAV waterfowl mortality coincident with peak bald eagle nesting activity from January 1 through April 1, 2022, as detected by SCWDS and reported on USDA website 13 . …”
Section: Introductionmentioning
confidence: 60%
“…Further, bald eagles were detected with HP IAV in areas that did not correspond to waterfowl congregations 10 . Thus, as has been suggested for common buzzards ( Buteo buteo ) and white-tailed sea eagles ( Haliaeetus albicilla ) infected with HP H5N8 IAV in Europe 13 , 14 , bald eagles may serve as a sensitive ecological indicator species for this virus in North America, just as they have for environmental contaminants such as lead, mercury, and the more recently characterized aetokthonotoxin, an alkaloid toxin produced by the cyanobacterium Aetokthonos hydrillicola 22 . However, it is important to recognize that eagle nest success is not routinely monitored in many areas and without more comprehensive monitoring, future impacts will not be detected, quantified or (potentially) mitigated.…”
Section: Discussionmentioning
confidence: 85%
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