The Food and Drug Administration said on Saturday that parents and caregivers should stop using some batches of ByHeart Whole Nutrition Infant Formula after health agencies found an increase in the number of botulism infections in infants who had consumed the powdered formula.

Since August, at least 13 infants in 10 states who had been given the formula have had botulism type A infections, according to the FDA, which is investigating the outbreak with the Centers for Disease Control and Prevention and state and local health agencies, including California’s Infant Botulism Treatment and Prevention Program.

No deaths have been reported.

In a statement about the outbreak, the FDA identified two lots of the infant formula, which is available online and at major retailers, that it said shoul

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