USDA declares Illinois “Unaffected” by H5N1 Avian Influenza

FOX23 News at 9 p.m.

SPRINGFIELD, Ill., (KBSI) – The U.S. Department of Agriculture has designated Illinois as “unaffected” by H5N1 avian influenza, recognizing the state’s success in protecting its dairy supply through ongoing testing and surveillance.

The designation means there is no evidence of the disease in Illinois dairy cattle, according to the Illinois Department of Public Health (IDPH) and the Illinois Department of Agriculture (IDOA). Officials credited collaboration among state agencies, local health departments, dairy farms and agricultural organizations.

“Public health truly excels through the power of partnership,” said IDPH Director Dr. Sameer Vohra. “We are grateful to our colleagues and farm operators who went the extra mile to keep our dairy supply safe.”

IDOA Director Jerry Costello II said the designation reflects “the vigilance and dedication of our farm families and the strength of our biosecurity efforts statewide.” Illinois Farm Bureau President Brian Duncan added that protective equipment and guidance provided to farmers helped maintain confidence in dairy operations.

While dairy cattle remain unaffected, officials cautioned that the fall migration season brings the risk of infected wild birds entering Illinois. IDPH urged residents to avoid contact with dead or sick birds, report multiple bird deaths to local health officials or the Illinois Department of Natural Resources, and seek medical attention if they develop flu-like symptoms after possible exposure.

H5N1, or highly pathogenic avian influenza (HPAI), is a contagious virus found in waterfowl and other birds that can spread to cattle or humans. Illinois agencies have been monitoring dairy operations since spring 2024, providing educational resources and protective equipment to reduce risk.

Health officials emphasized that the risk to the general public remains low, but precautions are important. Treatment for flu-like illness following exposure is most effective if started within two days.

More information on H5N1, including FAQs and safety guidance, is available on the Illinois Department of Public Health.