Broccoli packages sold at Walmart stores in 20 states have received an elevated recall status over a Listeria contamination that has potentially fatal consequences.

The recall affects 12-ounce bags of the product, which were sold in 20 states and pose serious health risks if consumed.

The Food and Drug Administration has updated the recall of Broccoli florets sold at Walmart to class I risk level, which is the highest level of risk.

In early January it was revealed that Walmart's washed and ready-to-eat 12 oz. Marketside Broccoli Florets were voluntarily recalled by Braga Fresh due to a possible contamination of Listeria monocytogenes. Although the item is no longer on shelves, consumers could still have bags in their freezer.

When the FDA upgrades a recall, it's time to check your fridge or freezer for that particular product. This broccoli now poses a more serious Listeria risk.

A recall of bags of Braga Fresh broccoli florets has been revised and is now listed as a Class 1 recall, the highest level of risk the FDA issues.