In the United States, it has been more than a month since the last detection of highly pathogenic avian influenza (HPAI) in a commercial poultry flock, while Canada has gone over three months without a similar incident.
The most recent U.S. commercial case was confirmed on July 2 in Lancaster County, Pennsylvania, involving 29,300 gamebirds raised for release. According to the U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS), all control zones linked to recent outbreaks have now been lifted. The final U.S. control area, surrounding the Pennsylvania flock, was released on July 24, following the earlier removal of restrictions for two commercial egg layer flocks in Maricopa County, Arizona. The last detection in a U.S. backyard flock occurred on June 11.
In Canada, the last commercial outbreak occurred on May 2 at a turkey and duck operation in Wallace, Manitoba, affecting approximately 14,400 birds. While several backyard and non-poultry farms experienced HPAI detections in May, the most recent was reported on May 15 in Kings County, Prince Edward Island.
The World Organisation for Animal Health (WOAH) reports that zoning and movement restrictions have been lifted in all Canadian provinces except British Columbia and Manitoba. Quarantines have been removed from all infected premises except in British Columbia, Manitoba, and Prince Edward Island.
