| 2024 McDonald's E. coli outbreak | |
|---|---|
| Bacteria strain | Escherichia coli O157:H7 |
| Source | Silvered onions used on Quarter Pounders at McDonald's restaurants |
| Location | United States |
| First reported | October 22, 2024 |
| Date | September 27, 2024 – ongoing |
| Confirmed cases | 90 |
| Hospitalized cases | 27 |
Deaths | 1 |
The 2024 McDonald's E. coli outbreak is an ongoing outbreak involving contaminated slivered onions on Quarter Pounders sold at McDonald's stores in 13 U.S. states. At least 90 people have contracted Escherichia coli and one person has died.[1]