Salads sold at Walmart, Whole Foods, Trader Joe’s, and 7-Eleven are being recalled.

Suppliers recalled a combined 2,811 pounds of ready-to-eat salads on Wednesday because of concerns about salmonella and listeria.

Corn used in the salads, purchased from a shared supplier, was recalled earlier this week because of contamination fears.

Hundreds of pounds of salad sold at Whole Foods, Trader Joe’s, and Walmart are being recalled because of concerns about salmonella and listeria contamination.

The food suppliers GHSE, Prime Deli Corporation, Mary’s Harvest Fresh Foods, and GH Foods CA recalled a combined 2,811 pounds of ready-to-eat salads, the US Department of Agriculture’s Food Safety and Inspection Service announced Wednesday. The salads were sold at chains including Whole Foods, Trader Joe’s, Walmart, and 7-Eleven.

The producers of the ready-to-eat salads learned of the potential contamination when a shared supplier recalled the corn used in the salads earlier this week.

Recalled salads include:

Walmart’s Marketside Fiesta Salad with Steak

7-Eleven Bistro Southwest Style Salad with Bacon

Trader Joe’s Mexicali-Inspired Salad with Chili Seasoned Chicken

Mary’s Harvest Southwest Chicken Wrap with Rib Meat

365 by Whole Foods Market BBQ-Style Chopped Salad with Chicken

365 by Whole Foods Market Chicken Fajita Salad

GH Foods CA’s Santa Fe-Style Salad with Chicken and BBQ-Style Salad Kit with White Chicken

The recalled salads were all produced earlier in October. The USDA’s website has more information on how to identify recalled salads.

As of Wednesday, there had not been any reports of illnesses associated with the salads.

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If you’ve purchased one of the recalled salads, the USDA advises returning or disposing of it immediately.

Salmonella and listeria have been responsible for several widespread food-poisoning outbreaks in recent history.

In 1985, more than 6,000 people were sickened and nine people died in a salmonella outbreak tied to tainted milk. A 2009 salmonella outbreak linked to a peanut factory sickened more than 500 people, eight of whom died.

Earlier this year, South Africa was hit with the largest listeria outbreak ever detected, according to the World Health Organization. It left more than 200 people dead.

The most recent major listeria outbreak in the US was in 2011, when seven people died after eating contaminated cantaloupe.