An E. Coli outbreak linked to onions served at McDonald’s restaurants across multiple states is now considered over, according to the Centers for Disease Control and Prevention (CDC). The agency announced the end of the outbreak on November 13, 2024, after McDonald’s and its onion supplier, Taylor Farms, took steps to remove potentially contaminated onions from their supply chains.
The outbreak, which began in October 2024, initially involved 73 confirmed cases across 16 states. As of October 30, 2024, the CDC reported a total of 90 illnesses, with 27 hospitalizations. The most recent illness onset date was October 16, 2024. The CDC’s investigation identified fresh, slivered onions as the likely source of the contamination.
The Food and Drug Administration (FDA) also investigated the outbreak, focusing on onions. According to the CDC, all new illnesses occurred before McDonald’s and Taylor Farms initiated the removal of onions from their food service locations. This proactive measure led the CDC to conclude that the risk to the public is now very low.
Symptoms of E. Coli infection typically include severe stomach cramps, diarrhea (often bloody), and vomiting, usually appearing 3 to 4 days after exposure to the bacteria. While most individuals recover within 5 to 7 days without treatment, some may develop hemolytic uremic syndrome (HUS), a serious kidney complication requiring hospitalization.
The CDC advises individuals experiencing severe symptoms of E. Coli infection to seek medical attention and inform their healthcare provider about potential exposure through food consumption. Businesses were also advised to refrain from using recalled onions supplied by Taylor Farms.
The CDC’s investigation update is available on their website, https://www.cdc.gov/ecoli/outbreaks/e-coli-O157.html. Individuals with questions about cases in specific states are directed to contact their state’s health department.
