A baby in Oklahoma tested positive for the bacteria Cronobacter. This bacteria has at times been linked to a rare illness in newborns and has been discovered in milk-based powdered baby formula.
The Oklahoma Department of Health says the baby did not consume Mead Johnson Nutrition Company's Enfamil formula.
Enfamil had been given to a newborn in Missouri who later died and was also given to a baby still recovering in Illinois.
Both of those cases have been confirmed to have been infected with Cronobacter.
So far, a federal investigation has failed to establish a link between formula and the infections.
In addition, Mead Johnson has said its tests have found Enfamil to be safe.