The FDA announced that a food distributor is recalling all ReadyCare and Sysco Imperial Frozen Supplemental shakes, typically sold to long-term care facilities, over listeria concerns.

The supplemental shakes are labeled under the brands Lyons ReadyCare and Sysco Imperial and were sold to institutional customers, including hospitals and long-term care facilities, officials said.

Frozen shakes sold to nursing homes and other institutions are being recalled after a listeria outbreak in 21 states that has caused 11 deaths, according to the Federal Food and Drug Administration.