Mcdonald'S E Coli Outbreak October 2025 Florida. Illnesses started on dates ranging from sept 27, 2025, to october 10,. Epidemiologic and traceback data show that fresh, slivered onions served at mcdonald’s were the likely source of this outbreak.
Mcdonald’s pulled fresh, slivered onions. Coli outbreak linked to slivered onions served on quarter pounders has expanded to even more states with additional people sickened, an update from the centers.