A food manufacturer in Maryland has recalled more than 3,000 tomato soup kits sold at Walmart due to possible listeria contamination, the company recently announced.

Kettle Cuisine of Savage, Maryland, recalled 3,240 packs of Marketside Tomato Bisque Soup Kits on Aug. 12, according to an alert shared on the U.S. Food and Drug Administration (FDA) website.

The soup kits were sold in 29 states, including California, Delaware and North Carolina.

“The product has the potential to be contaminated with listeria monocytogenes, an organism that can cause serious and sometimes fatal infections in young children, frail or elderly people, and others with weakened immune systems,” the recall notice reads.

Kettle Cuisine said it recalled the soup kits after conducting routine testing and found “a presumptive positive result for listeria monocytogenes.” There haven’t been any reports of illnesses connected to the soup kits, but the company is investigating the possible contamination with the FDA.

Where were the soup kits sold?

The soup kits were sold in select Walmart stores in the following states between June 30 and July 7:

• Arkansas
• California
• Colorado
• Connecticut
• Delaware
• Georgia
• Iowa
• Illinois
• Indiana
• Kansas
• Kentucky
• Louisiana
• Maryland
• Missouri
• Mississippi
• North Carolina
• New Jersey
• New Mexico
• Nevada
• New York
• Ohio
• Oklahoma
• Oregon
• Pennsylvania
• Texas
• Virginia
• Vermont
• Wisconsin
• West Virginia

How do I know if I have the product?

The soup kits are sold in wrapped trays with a product description label, Kettle Cuisine said. The kits were sold in 14-ounce trays with UPC No. 194346474004 and an expiration date of Aug. 22, 2026.

The company said customers who have the soup kits should take the following precautions:

• Refrain from eating, serving, selling or distributing the kits.
• Throw the kits away or return them for a refund.
• Wash their hands after handling the product. 
• Clean and sanitize refrigerators, freezers, containers, utensils, countertops and other surfaces that the kits may have touched.

What are the symptoms of infection?

Healthy individuals may experience short-term listeriosis symptoms such as high fever, severe headache, stiffness, nausea, abdominal pain and diarrhea, the announcement on the FDA’s website reads.

Invasive listeriosis occurs when listeria spreads beyond the intestines, according to the Centers for Disease Control and Prevention (CDC). Symptoms of invasive listeriosis usually begin within two weeks of ingesting the contaminated food.

For pregnant women, symptoms may include fever and flu-like symptoms such as muscle aches and fatigue. Symptoms in pregnant women are usually mild, and some never have symptoms, the CDC said.

Still, infection during pregnancy can lead to miscarriage, stillbirth, premature delivery or life-threatening infection of the newborn, the CDC said.

“In cases of invasive listeriosis not associated with pregnancy, almost 1 in 6 people die,” the CDC said on its website.

Those who have eaten foods contaminated with listeria and show symptoms should contact a doctor, the recall alert reads.

Customers with questions can contact the Kettle Cuisine Hotline at 617-409-1104 Monday to Friday from 8 a.m. to 5 p.m. ET.

Saleen Martin is a reporter on USA TODAY’s trending team. She is from Norfolk, Virginia – the 757. Email her at sdmartin@usatoday.com.