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

Federal regulators, which have fielded reports from 19 states, say the number of people sickened may be much higher.

Whole fresh cucumbers from Sunfed Produce — sold at Walmart, Wegman's, and other retailers — have been linked to salmonella in the U.S. and Canada.