NASHVILLE, Tenn. (AP) — The Centers for Disease Control and Prevention says backyard chickens likely are supporting the Salmonella outbreaks in 21 states.

The Thursday announcement says five individuals have been hospitalized and about a quarter of the 52 folks are below the age of 5. Four of those folks are now living at Tennessee.

A CDC news release says most of the people reported using touch chicks or ducklings, which it says were accessed through sources containing hatcheries and agricultural stores. The CDC says people can get sick from their environment or touching backyard poultry.

It says sick birds can appear clean. It says people avoid after snuggling them, touching their faces and have to wash their hands after handling the birds.