At least 15 babies in 12 states have been sickened in the outbreak since August, with more cases pending, according to state and federal health officials.
All of the infants were hospitalised after consuming ByHeart formula, officials said. No deaths have been reported.
ByHeart officials expanded the voluntary recall from two lots announced on Saturday to all products in consumers' homes and in stores. That includes ByHeart Whole Nutrition Infant Formula and Anywhere Pack pouches of powdered formula.Â
The company sells about 200,000 cans of infant formula a month online and in stores such as Target, Walmart, Albertsons and Whole Foods, according to Dr Devon Kuehn, chief medical officer.
Parents and caregivers who have the formula in their homes "should immediately discontinue use and dispose of the product," Kuehn said.
Company officials said they enacted the unusual recall "in close collaboration" with the US Food and Drug Administration "despite the fact that no unopened ByHeart product has tested positive" for the contamination.
California health officials earlier confirmed that a sample from an open can of ByHeart baby formula fed to an infant who got sick contained the type of bacteria that causes the toxin linked to the outbreak.
"This action underscores ByHeart's core mission: protecting babies above all else," the company said in a statement.
The US Food and Drug Administration is investigating 84 cases of infant botulism detected since August. Of those, 36 consumed infant formula, with a more than a third who received ByHeart formula, the agency said in a statement.
"This information shows that ByHeart brand formula is disproportionately represented among sick infants in this outbreak, especially given that ByHeart represents an estimated one per cent of all infant formula sales in the United States," the FDA statement said.
ByHeart produces formula powder at a plant in Allerton, Iowa, and then ships it to a site in Portland, Oregon, for canning and distribution, Kuehn said.
US Food and Drug Administration inspectors were at the Portland plant, she added.
In addition to the broad recall, the company said it is testing every batch of formula with an independent third-party laboratory, providing health officials full access to its sites and sharing results with regulators as they become available.
Infant botulism is a rare and serious illness that occurs in babies under age one, whose gut microbiomes are immature. It is caused when the infants consume bacteria that contain spores that produce a toxin in the gut. Symptoms include constipation, poor feeding, drooping eyelid, weak muscle tone, difficulty swallowing and breathing problems, among others.
16°C