CDC reports E. coli outbreak tied to McDonald’s Quarter Pounders

CDC is investigating a multistate outbreak of E. coli O157:H7 linked to McDonald’s Quarter Pounders. As of October 22, 49 cases have been reported across 10 states, with 10 hospitalizations and one death. Preliminary data suggest slivered onions used in the burgers may be the contamination source. McDonald’s has temporarily stopped using these onions and Quarter Pounder beef patties in affected states. The true number of cases is likely higher, as many recover without medical care. CDC, FDA, and USDA are collaborating to identify the specific contaminated ingredient and prevent further cases.