Avian Influenza strikes U.S. again following new outbreak in Ohio

A resurgence of HPAI has impacted poultry operations across 19 U.S. states, with Ohio emerging as the epicenter of the latest outbreak.

David Corredor

A resurgence of Highly Pathogenic Avian Influenza (HPAI), commonly known as bird flu, has impacted poultry operations across 19 U.S. states, with Ohio emerging as the epicenter of the latest outbreak. The virus, identified as H5N1, has led to the culling of nearly 15 million birds in Ohio alone, making it the most affected state in the country.

• The outbreak, which began in late 2024 and intensified through early 2025, has disrupted the egg supply chain nationwide.
• Ohio, one of the top egg-producing states, saw its commercial egg-laying population drop from 42 million to approximately 35 million hens.
• The economic impact has been significant, with egg prices peaking at over \$8 per carton in March before gradually declining.

The U.S. Department of Agriculture (USDA) responded with a \$1 billion strategy aimed at long-term containment and prevention. This includes \$500 million for enhanced biosecurity measures, \$400 million in financial relief for affected producers, and \$100 million for research into vaccines and therapeutic tools.

The spread of HPAI has been attributed to seasonal wild bird migrations, which facilitate transmission across regions. Recent detections in wild birds have been reported in states such as Indiana, Utah, and Wisconsin, raising concerns about further spread.

• Despite the scale of the outbreak, the Centers for Disease Control and Prevention (CDC) maintains that the public health risk remains low.
• However, sporadic human cases have been documented, including one in Ohio involving a farmworker exposed to infected poultry.
• The CDC continues to monitor human exposures and has integrated H5 surveillance into its national flu tracking systems.

Industry leaders in Ohio have expressed cautious optimism, stating that the state has “put a bookend” on the outbreak thanks to aggressive containment efforts and improved preparedness. Nevertheless, vigilance remains high as producers implement stricter biosecurity protocols to prevent future flare-ups.