Multi-State E. Coli Outbreak Linked to McDonald’s: What You Need to Know

Cases have also been reported in Oregon, Montana, Wyoming, Utah, Kansas, Iowa, Missouri, and Wisconsin. Utah and Wyoming reported four cases each, while the other states have each only reported one case, according to the agency.
In multiple states—Colorado, Kansas, Utah, Wyoming, and portions of Idaho, Iowa, Missouri, Montana, Nebraska, Nevada, New Mexico, and Oklahoma—McDonald’s temporarily stopped using the slivered onions and the quarter-pound beef patties, the agency said.
Investigators are still working to investigate what ingredient in the Quarter Pounders was contaminated with E. coli, the CDC said, noting that “fresh slivered onions” are used on the burgers and not other McDonald’s menu items.
In a statement Tuesday, McDonald’s North America Chief Supply Chain Officer Cesar Pina said the outbreak is linked to the onions used on the Quarter Pounders.
The CDC says that individuals who suspect they may have contracted E. coli and have severe symptoms should contact a health care provider. Severe symptoms can include a fever of 102 degrees F or higher, diarrhea for more than three days that is not improving, bloody diarrhea, vomiting so much that liquids cannot be kept down, as well as signs of dehydration such as not urinating often, a dry mouth and throat, and feeling dizzy when standing.
“Some people may develop serious kidney problems (hemolytic uremic syndrome, also called HUS) and would need to be hospitalized,” the CDC  warns.
The former president’s campaign has since promoted the event, while Vice President Kamala Harris’s campaign has accused him of engaging in a publicity stunt.