Walmart, Wegmans and Albertsons stores have recalled cucumbers for possible contamination with salmonella. They were sold in more than half of states.

The FDA said SunFed Produce is recalling all sizes of whole fresh American cucumbers sold between Oct. 12 and Nov. 26 because they may be contaminated with salmonella.

A salmonella outbreak that may be linked to cucumbers has sickened at least 68 people across 19 states, according to federal health officials. At least 18 people have required treatment at hospitals,