The FDA, USDA FSIS, CDC, and state partners continue to work quickly and collaboratively to investigate and identify the source of illnesses linked to E. coli contamination in McDonald’s Quarter Pounders.


McDonald's E Coli

UPDATE: McDonald’s Quarter Pounders Outbreak Investigation of E. coli O157:H7 (McDonald’s Reponse Included)

The FDA, USDA FSIS, CDC, and state partners continue to work quickly and collaboratively to investigate and identify the source of illnesses linked to E. coli contamination in McDonald’s Quarter Pounders. 

Source: Food and Drug Administration
October 25, 2024
Image: Courtesy McDonald’s

The FDA, USDA FSIS, CDC, and state partners continue to work quickly and collaboratively to investigate and identify the source of illnesses linked to E. coli contamination in McDonald’s Quarter Pounders. 

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As of October 24, 75 people infected with the outbreak strain of E. coli O157:H7 have been reported from 13 states. Illnesses started on dates ranging from Sept 27, 2024, to October 10, 2024. Of 61 people with information available, 22 have been hospitalized, and 2 people developed hemolytic uremic syndrome, a serious condition that can cause kidney failure. One death has been reported from an older adult in Colorado. Of the 42 people interviewed, all 42 (100%) report eating at McDonald’s, and 39 people report eating a beef hamburger.

FDA is using all available tools to confirm if onions are the source of this outbreak. This includes working with federal and state partners and the companies involved to collect and evaluate records and distribution information as part of our traceback investigation. FDA and state partners are also collecting onion samples for analysis.

While the investigation is ongoing, Taylor Farms, the supplier of slivered onions for the affected McDonald’s locations, has initiated a voluntary recall. Recalled yellow onions were sold to additional food service customers. Customers who received recalled onions have been directly notified of the recall.

FDA is working closely with the implicated firms and will continue to provide updates as they become available, including any additional recalls or notifications that might be needed for recipients of recalled onions.

At this time, FDA is not aware of any cases or affected product outside of the United States.

More information will be provided as it becomes available. 

Read the full update

McDonald’s Response

UPDATE: October 22, 2024

McDonald’s North America Chief Supply Chain Officer Cesar Piña shared the following internal message.

Across the McDonald’s System, serving customers safely in every single restaurant, each and every day, is our top priority and something we’ll never compromise on.

It is why we are taking swift and decisive action following an E. Coli outbreak in certain states. The initial findings from the investigation indicate that a subset of illnesses may be linked to slivered onions used in the Quarter Pounder and sourced by a single supplier that serves three distribution centers. As a result, and in line with our safety protocols, all local restaurants have been instructed to remove this product from their supply and we have paused the distribution of all slivered onions in the impacted area.

Out of an abundance of caution, we are also temporarily removing the Quarter Pounder from restaurants in the impacted area, including Colorado, Kansas, Utah and Wyoming, as well as portions of Idaho, Iowa, Missouri, Montana, Nebraska, Nevada, New Mexico, and Oklahoma. We take food safety extremely seriously and it’s the right thing to do. Impacted restaurants are receiving a stock recovery notice today and should reach out to their field supply chain manager or distribution center with any questions.

We are working in close partnership with our suppliers to replenish supply for the Quarter Pounder in the coming weeks (timing will vary by local market). In the meantime, all other menu items, including other beef products (including the Cheeseburger, Hamburger, Big Mac, McDouble and the Double Cheeseburger) are unaffected and available. We will continue to work with the Centers for Disease Control and Prevention (CDC) and are committed to providing timely updates as we restore our full menu.

Please see below for a brief video message from Joe on this topic:

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