WASHINGTON — Sliced apples distributed to fast-food and grocery chains across the country are among products being recalled due to possible listeria contamination.

No illnesses have been reported, but listeria was found on equipment used to produce apple products by Missa Bay LLC, owned by Ready Pac Foods Inc. of Swedesboro, N.J.

Packaged apple slices distributed to McDonald’s and Burger King in some states are included in the recall, as are some packaged fruit, vegetables, salads, and sandwiches containing apples distributed to Wawa convenience stores and Wegman’s grocery chains, as well as various apple and fruit snacks with ‘‘Ready Pac’’ labels and apple salad kits with a ‘‘Safeway Farms’’ label.

The recalled snacks have use-by dates of July 8 through Aug. 20, the company said. People who may have purchased the recalled products are asked to contact Ready Pac at 800-800-7822. Information is available on the company’s website at www.readypac.com.