The Centers for Disease Control and Prevention says the cases occurred from late February to late May and are spread through 15 states. Ohio had the most cases, with eight. The other states were Georgia, Indiana, Kentucky, Michigan, Maryland, Minnesota, North Carolina, New York, Pennsylvania, Tennessee, Virginia, Vermont, Wisconsin and West Virginia.

No deaths have been reported but at least nine were hospitalized. People who got sick ranged from small children to elderly adults, but nearly half were kids ages 5 and under.

A mail order hatchery was identified as the source of infected birds, but CDC officials on Thursday did not name the business.