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

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.

Broccoli florets sold in Walmart stores across 20 states that were recalled over bacterial contamination fears have been given the U.S. Food and Drug Administration (FDA)'s highest risk level. A single production lot of the washed and ready-to-eat Marketside Broccoli Florets by Braga Fresh were voluntarily recalled after random testing by Texas Health and Human Services in a store identified the presence of the bacteria Listeria monocytogenes.

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.

Around the same time the U.S. Food and Drug Administration (FDA) updated Costco's Kirkland Signature Smoked Salmon recall to a Class I designation, the organization also updated Marketside Broccoli Florets recall to Class I,