Avian Influenza (H5N1)

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In March 2022, cases of highly pathogenic avian influenza A (H5N1) were detected in wild birds and commercial poultry in Ontario. The same strain has been detected in other Canadian provinces and American states, as migrating waterfowl spread it from one area to another.

Outbreaks of avian influenza have been identified on poultry farms in Ontario. Given the important number of cases detected in migratory wild birds and in commercial operations across North America, more farms may experience outbreaks in the coming weeks and months. In Eastern Ontario, H5N1 was recently identified in the Kingston, Frontenac, and Lennox & Addington region, as well as the Eastern Ontario Health Unit’s region.

Avian Influenza (AI) is caused by a virus that mainly infects domestic poultry and wild birds like geese, ducks, and shore birds. As is the case for humans, there is a “bird flu” season each year, and certain strains are worse than others. Highly pathogenic avian influenza (HPAI) H5N1 is a strain that kills both wild birds and commercial poultry. For more information about transmission and symptoms please visit EOHU Confirms Presence of Avian Influenza in the Region | EOHU | Public Health

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