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Coverage dated November 21, 2025 to November 24, 2025

ByHeart baby formula from all lots may be contaminated with botulism bacteria, tests show

Headline from WDIO Duluth, on the newest of 2 developments

The makers of ByHeart infant formula say tests of products tied to a botulism outbreak show that all of the company's products may have been contaminated. Laboratory tests of 36 samples of formula from three different lots showed that five samples contained the type of bacteria that can lead to the …

WDIO Duluth's own description from its feed. We collect headlines and these descriptions, not full articles; read the original reporting below.

Developments in this update

2 dated developments, oldest first, newest marked. Each is named by one outlet's own headline; open its reports to see every outlet that covered it.

  1. ByHeart formula may have sickened other babies months before botulism outbreak

    Headline from FOX 4 Dallas ·

  2. Newest

    ByHeart baby formula from all lots may be contaminated with botulism bacteria, tests show

    Headline from WDIO Duluth ·

7 reports not tied to one development ·

Read the reports

Reports & sources

32 articles, oldest first.

  1. Bangor Daily News

    Babies who drank ByHeart formula got sick months before botulism outbreak, parents say (opens Bangor Daily News)

    Published

    Bangor Daily News's feed description

    As health officials investigate more than 30 cases of infant botulism linked to ByHeart baby formula since August, parents who say their children were

  2. FOX 4 Dallas

    ByHeart formula may have sickened other babies months before botulism outbreak (opens FOX 4 Dallas)

    Published

    FOX 4 Dallas's feed description

    Parents whose babies were sickened with botulism some nine months before the current outbreak linked to ByHeart formula are demanding answers.

  3. NBC Los Angeles

    More families sue ByHeart as company confirms botulism spores were found in its infant formula (opens NBC Los Angeles)

    Published

    NBC Los Angeles's feed description

    More than 30 infants have been sickened in the botulism outbreak.

  4. WDIO Duluth

    ByHeart baby formula from all lots may be contaminated with botulism bacteria, tests show (opens WDIO Duluth)

    Published

    WDIO Duluth's feed description

    The makers of ByHeart infant formula say tests of products tied to a botulism outbreak show that all of the company's products may have been contaminated. Laboratory tests of 36 samples of formula from three different lots showed that five samples contained the type of bacteria that can lead to the …

  5. CNN

    Investigators race of find the cause of botulism contamination in ByHeart infant formula (opens CNN)

    Published

    CNN's feed description

    Thirty-one infants have developed botulism after consuming powdered formula from the company ByHeart.

  6. CBS News

    ByHeart says all its baby formula could be tainted with botulism (opens CBS News)

    Published

    CBS News's feed description

    ByHeart said it can't rule out that all of its baby formula across all product lots could be contaminated, citing recent test results.

Identical headlines usually mean shared wire copy. They are counted as separate articles but are not independent confirmation.

ByHeart baby formula from all lots may be contaminated with botulism bacteria, tests show | Since Then