Preliminary testing has linked beef meatball marinara linguine meals sold under the brand Marketside, and chicken fettuccine alfredo meals sold under the brands Marketside, Home Chef and Trader Joe's, to the outbreak. These products were available at Walmart, Kroger and Trader Joe's stores nationwide.

The latest recall connected to a listeria outbreak covers nearly 245,000 pounds of pasta distributed to four states. See affected products.

Federal health officials are warning consumers not to eat certain heat-and-eat beef meatball pasta meals sold at Walmart stores because they may be contaminated with listeria bacteria previously linked to a deadly outbreak.

Walmart's Marketside linguine and meatball products face a food safety alert after testing positive for listeria bacteria linked to a previous outbreak.

The outbreak, which was announced in June, has led to a wave of recalls of ready-to-eat pasta meals that use pasta from food supplier Nate’s Fine Foods, according to the Food and Drug Administration. Some of the meals were distributed by FreshRealm, a food service company. Others were sold at major supermarket chains.

Hellofresh: Listeria contamination has become a growing concern with several food products recently pulled from shelves. Fresh advisories and recalls continue to be issued as authorities work to contain the spread.

The USDA says the precooked pasta products, sold at Trader Joe's and Walmart, could be connected to a nationwide listeria outbreak that has killed four people and sickened at least 20 others.