A deadly listeria outbreak has resulted in a recall of frozen supplemental shakes used at long-term care facilities. The shakes were made by Prairie Farms Dairy Inc. based in Fort Wayne, Indiana, and were sold under the brands of Lyons ReadyCare and Sysco Imperial, the Food and Drug Administration.

Frozen shakes served at hospitals and nursing homes are being recalled after they were linked to a deadly outbreak of listeria, the U.S. Food and Drug Administration said. The agency said in an update Monday that 12 people have died.