Penn State Extension announced on May 15 that highly pathogenic avian influenza (HPAI) remains a threat to poultry producers and hobbyists, even as migration season ends. The organization said HPAI continues to be detected in both poultry and wild birds across the United States and internationally.
The alert is important because from January to April 2026, Pennsylvania recorded 30 detections of HPAI in commercial and backyard flocks, affecting approximately 8.7 million birds. Since the outbreak began in 2022, nearly 16 million birds have been impacted by HPAI within Pennsylvania alone. Penn State Extension emphasized that biosecurity measures are still critical for all flock owners.
The virus has also appeared in species beyond poultry, including wildlife, mammals, and livestock. In spring of 2024, it was found in U.S. dairy cattle herds; however, as of May 2026, Pennsylvania is considered free of the disease in dairy cattle through milk-testing programs with ongoing monitoring. While HPAI does not cause death in dairy cattle, Penn State Extension said cross-contamination risks remain for farms with multiple animal species.
Poultry owners are encouraged to maintain strict biosecurity practices such as using designated footwear around flocks; cleaning and disinfecting equipment; keeping poultry away from wild animals; securing feed containers; maintaining enclosed shelters or coops; limiting visitors; not sharing tools or equipment with other owners; and using properly maintained footbaths at entry points. Movement permits are required for transporting poultry or related products into or out of control areas—a process that requires a premise ID and an approved biosecurity plan from the Pennsylvania Department of Agriculture.
Registering for a premise ID helps animal health officials quickly identify affected locations during outbreaks and ensures timely communication about disease events like HPAI according to the official website of Penn State Extension. Owners should register their flock’s location even if they live elsewhere.
According to the official website, Penn State Extension delivers science-based education on agriculture and environmental stewardship throughout every county via local offices and digital resources while collaborating with government agencies, industry partners, and offering workshops on topics such as farming best practices.
Anyone noticing increased mortality or clinical signs consistent with HPAI—such as lethargy or respiratory distress—should call the emergency veterinarian at PDA at 717-772-2852 immediately.
