FDA
Current Update
October 30, 2024
FDA continues working with CDC, USDA FSIS, state partners, and involved firms to investigate an outbreak of E. coli O157:H7 infections linked to onions. Epidemiologic and traceback data show that slivered onions served at affected McDonald’s locations are the likely source of this outbreak.
As of October 30, 90 people from 13 states have been infected with the outbreak strain of E. coli O157:H7. Illnesses started on dates ranging from Sept 27, 2024 to October 16, 2024. Of 83 people with information available, 27 have been hospitalized, and 2 people developed HUS, a serious condition that can cause kidney failure. One death has been reported from an older adult in Colorado. This person is not one of those who developed HUS. More illnesses have been reported but they are from before McDonald’s and Taylor Farms took action to remove slivered onions from food service locations.
Of the 62 people interviewed, all 62 (100%) report eating at McDonald’s. Forty-eight of 58 people (83%) reported a menu item containing fresh, slivered onions. Forty-six of 58 people (79%) reported a menu item made with fresh quarter pound beef patties. Overall, three people reported menu items that contained fresh, slivered onions, but not fresh quarter pound beef patties. One person reported a menu item with a fresh quarter pound beef patty but without fresh, slivered onions.
FSIS has conducted a thorough investigation in response to this outbreak, including traceback of beef patties served on Quarter Pounders at McDonald’s, and evidence does not point to ground beef as the likely source of contamination. FSIS used specific meal information reported by ill people to trace beef patties through the supply chain to the establishment where they were produced and did not identify a beef source. Testing on beef patties by the Colorado Department of Agriculture is complete and all samples were found to be negative for E. coli. FSIS will continue to work closely with federal and state partners.
On October 22, 2024, Taylor Farms recalled yellow onions that were supplied to McDonald’s and other food service customers. FDA is working with Taylor Farms and their direct customers to determine if additional downstream customer recalls are necessary. According to available information, it is unlikely that recalled yellow onions were sold to grocery stores or directly to consumers. Food service customers who received recalled onions were contacted and should no longer be using or serving recalled onions. These customers should also ensure that they did not freeze recalled onions or foods containing recalled onions.
In addition, FDA has initiated inspections at a Taylor Farms processing center in Colorado and an onion grower of interest in Washington state. FDA’s investigation is ongoing.
McDonald’s continues to not use slivered onions in impacted states. The current risk of illness from E. coli contamination is low because onions have been recalled and should no longer be available.
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