Federal health officials say they have confirmed more than 500 cases of people who became sick with an intestinal illness after eating McDonald’s salads.
The illnesses reported earlier this year are linked to the cyclospora parasite, which can cause diarrhoea, intestinal pain, nausea or tiredness.
McDonald’s stopped the sale of salads at 3,000 restaurants last month until it could find a different supplier.
The FDA says it is still investigating the supplier of romaine lettuce and carrots.
States with cases include: Iowa, Indiana, Michigan, Minnesota, Missouri, Nebraska, Ohio, South Dakota and Wisconsin. Officials also said people sickened in Connecticut, Florida, New York City, Tennessee, and Virginia had travelled in Illinois and Kentucky.