Nearly two dozen babies in 13 states have been sickened in a growing outbreak of infantile botulism linked to recalled ByHeart infant formula, federal health officials said Friday.

The U.S. Food and Drug Administration reported 23 cases of confirmed or suspected illness in babies who consumed ByHeart formula since August. That’s an increase of 10 babies treated for the rare and potentially deadly disease since the outbreak was announced Nov. 8.

The most recent case was reported on Nov. 11. No deaths have been reported.

“Parents and caregivers should stop using any ByHeart infant formula products immediately,” the FDA said.

ByHeart, a New York-based manufacturer of organic infant formula, has recalled all its products sold in the U.S. The company, which accounts for about 1% of the U.S.

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