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Product title :

Avian influenza: the Canadian experience

Author(s) : J. Pasick, Y. Berhane & K. Hooper-McGrevy

Summary :

Reports of sporadic avian influenza outbreaks involving domestic poultry date back to the 1960s. With the exception of A/turkey/Ontario/7732/1966 (H5N9), which was isolated from a turkey breeding establishment, all viruses characterised prior to 2004 fit the criteria of low pathogenic avian influenza (LPAI). Only in retrospect was A/turkey/Ontario/7732/1966 shown to meet the criteria of a highly pathogenic avian influenza (HPAI). In 2004, Canada reported its first case of HPAI to the World Organisation for Animal Health (OIE). The outbreak, which began in a broiler breeder farm in the Fraser Valley of British Columbia, involved an H7N3 LPAI virus which underwent a sudden virulence shift to HPAI.
 
Keywords
Avian influenza – Highly pathogenic avian influenza – H5 subtype – H7 subtype – Low pathogenic avian influenza – Notifiable avian influenza – Virulence shift – Wild birds.

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