A baby nutrition company has announced a voluntary recall of its powdered infant formula following notification from the U.S. Food and Drug Administration about an ongoing investigation into a nationwide outbreak of botulism, including two suspected cases in Illinois.

The Illinois Department of Public Health (IDPH) on Saturday issued an advisory to parents and guardians recommending that they not use the formula ByHeart.

According to the Centers for Disease Control and Prevention, botulism is caused by a toxin that attacks the body's nerves and causes muscle weakness. It can be life-threatening.

Common signs and symptoms include difficulty swallowing; muscle weakness; drooping eyelids; blurry vision and difficulty breathing.

The two Illinois infants who have the symptoms both consume

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