Publications by authors named "C Yason"
Article Synopsis
- Following the detection of a novel highly pathogenic avian influenza virus (HPAIV) H5N1 in Newfoundland in late 2021, Canada ramped up surveillance efforts of wild birds to track the spread of the virus nationwide.* -
- During the first year of surveillance (November 2021-November 2022), over 6,000 sick and dead birds were tested, revealing that 27.4% were positive for HPAIV across various species and regions, particularly in the Atlantic and Central Flyways.* -
- The findings highlighted the need for ongoing monitoring and collaboration, as wild birds serve as both victims and reservoirs of the virus, with a notable prevalence of Eurasian-origin strains identified throughout
Highly pathogenic avian influenza (HPAI) viruses have spread at an unprecedented scale, leading to mass mortalities in birds and mammals. In 2023, a transatlantic incursion of HPAI A(H5N5) viruses into North America was detected, followed shortly thereafter by a mammalian detection. As these A(H5N5) viruses were similar to contemporary viruses described in Eurasia, the transatlantic spread of A(H5N5) viruses was most likely facilitated by pelagic seabirds.
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- Researchers isolated clade 2.3.4.4b H5N1 high-path pathogenicity avian influenza viruses from American crows and a red fox in Canada, revealing two distinct genetic clusters from North/South America and Europe.
- The study highlights migratory birds as the key factor in the virus's transcontinental spread, underscoring the ongoing threat to poultry, mammals, and wild bird populations.
- There is a need for coordinated surveillance programs between North America and Europe to monitor HPAI viruses, especially in regions where migratory birds travel.
Article Synopsis
- * Clinical symptoms in mesocarnivores indicated central nervous system infections, with some survivors developing antibodies against H5N1, showing potential disease spread into mammals.
- * The virus showed various genetic patterns and nearly 17% had mutations that could help adapt to mammalian hosts, emphasizing the importance of continuous monitoring for potential risks to human health.
Highly pathogenic avian influenza (HPAI) viruses of the A/Goose/Guangdong/1/1996 lineage (GsGd), which threaten the health of poultry, wildlife and humans, are spreading across Asia, Europe, Africa and North America but are currently absent from South America and Oceania. In December 2021, H5N1 HPAI viruses were detected in poultry and a free-living gull in St. John's, Newfoundland and Labrador, Canada.
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