poultry

All of these infections occurred in farmworkers who came into contact with infected cows or poultry, except one case in Missouri in which health officials could not track the origins of the infection.

A bird flu outbreak has been confirmed at a commercial poultry farm in Cornwall.

All of the reported cases have been described as mild, and each person is believed to have contracted the illness from infected livestock or poultry.

Currently, the Centers for Disease Control and Prevention is tracking the H5N1 avian flu that is widespread in wild birds worldwide and causing outbreaks in poultry and U.S. dairy cows.

Authorities believe the virus was acquired via an animal source; however, the teen was not on a farm nor near any known wild birds or backyard poultry — common reservoirs for the disease.