Some Canadian restaurant chains stop serving romaine lettuce amid E. coli outbreak

Some Canadian restaurant chains have stopped serving romaine lettuce amid a deadly outbreak of E. coli bacteria.

Cara Operations, which operates Swiss Chalet, Kelsey's and other chains, says it's making the move "out of an abundance of caution."

Spokeswoman Carmen Bain says Cara will continue to monitor the situation, and will re-evaluate its position as more information comes to light.

One person has died and dozens more have become ill in five provinces, according to the Public Health Agency of Canada.

The agency is encouraging people in Ontario, Quebec, New Brunswick, Nova Scotia and Newfoundland and Labrador to consider using other varieties of lettuce instead.

Boston Pizza has also temporarily suspended sales of romaine at its locations in the affected provinces.