The farm worker, who has a "presumptive positive" test for "highly pathogenic" bird flu, was exposed to an infected commercial flock of poultry, officials said.

The Department of Health Services in Wisconsin has reported the state's first human case of the bird flu. The agency on Wednesday said that someone exposed to a poultry flock sicked with Highly Pathogenic Avian Influenza A (H5N1) in Barron County has presumtively contracted the virus.

(WLUK) -- State health officials say they detected Wisconsin's first presumptive positive human case of Highly Pathogenic Avian Influenza A (H5N1), also known as bird flu, in Barron County.