According to the FDA, the contamination was discovered by the company during “internal testing of their products.”

Listeria monocytogenes [is] an organism which can cause serious and sometimes fatal infections in young children, frail or elderly people, and others with weakened immune systems," the FDA said.

Freeze-dried fruit snacks sold at Sam’s Club locations in Pennsylvania and over 40 other states were recalled this week due to a possible listeria risk, according to the Food and Drug Administration.