(UPDATED COVERAGE, 4:30 p.m.) L&M Companies is working with the Food and Drug Administration to determine how a single lot of cucumbers tested positive for salmonella.

Raleigh, N.C.-based L&M Cos. Inc. is recalling the product it distributed to East Coast, Southern and Midwestern retail and wholesale customers. Lee Anne Oxford, L&M’s director of marketing, said the bulk of the cucumbers was harvested in late March in south Florida and are marked Nature’s Delight with Lot No. PL-RID-002990 on the sides of the cartons.

L&M distributed 1,590 cartons March 30-April 7 to customers in New York, Florida, Illinois, Indiana and Tennessee and to a retailer that has distribution centers in Mississippi, Texas, Nebraska and Wyoming.

L&M officials say they launched the recall after FDA inspectors discovered salmonella in a random sample at a cooler at Plant City, Fla.-based Four Seasons Produce of Central Florida Inc. on April 13. Rob Ladd, Four Season’s partner, and Oxford said the FDA notified them about the positive salmonella find late the afternoon of April 21.

The product, harvested March 29 from an L&M grower near Immokalee, Fla., has likely exceeded its 10-14 day normal shelf life, Oxford said. She said L&M finished its cucumber production harvesting from that farm on April 7.

Oxford said L&M pulled all product from the farm lot associated with the FDA test.

“The only thing we know from FDA, the only thing they have shared with us was their test results from a single sample that was positive,” she said April 25. “So it’s unclear how the salmonella got on the cucumber.”

L&M is working with the FDA to update its customers on the recall situation, Oxford said.

Oxford said L&M’s farms are third-party, food safety certified and follow good agriculture practices. Though L&M distributed the recalled lot only directly to a handful of states, she said L&M chose to issue a nationwide voluntary recall to reduce any public health risk.