Kroger has recalled two pasta salad products—“Basil Pesto Bowtie Salad” and “Smoked Mozzarella Penne Salad”—due to potential Listeria contamination, the FDA announced Saturday.

The salads, made by Nate’s Fine Foods in Roseville, California, were sold across 1,860 Kroger stores in 29 states between Aug. 29 and Oct. 2.

Listeria monocytogenes can cause serious infections, with symptoms including fever, headaches, stiff neck, muscle aches, and in severe cases, seizures.

High-risk groups include pregnant people, newborns, seniors, and those with weakened immune systems, CBS News has reported.

Customers are advised to avoid consuming the products and return them for a refund.