Mcdonald'S E Coli 2025. Mcdonald’s shares fell in extended trading after the cdc said an e. Mcdonald’s hasn’t yet confirmed the source of the outbreak but has said that the likely culprit was the slivered raw onions that go into its quarter pounder burger.
October 23, 2025 at 7:23 a.m. Department of agriculture (usda) food safety and inspection service (fsis), and centers for disease control and prevention (cdc), in.