US closes investigation into E. coli outbreak linked to onions in McDonald’s Quarter Pounders

The U.S. government said Tuesday it has closed its investigation into an E. coli outbreak tied to McDonald’s Quarter Pounder hamburgers after determining there is no longer a safety risk.

The outbreak, which was first reported Oct. 22, sickened at least 104 people in 14 states, including 34 who were hospitalized, according to the U.S. Food and Drug Administration. One person in Colorado died and four people developed a potentially life-threatening kidney disease complication.

The FDA, which conducted the investigation along with the U.S. Centers for Disease Control and Prevention and state health departments, linked the outbreak to yellow onions distributed by California-based Taylor Farms and served raw on Quarter Pounders at McDonald’s restaurants in Colorado, Kansas, Wyoming and other states. Taylor Farms initiated a voluntary recall of yellow onions on Oct. 22.

McDonald’s briefly pulled Quarter Pounders from 3,000 U.S. stores as a result of the outbreak, then narrowed that to 900 stores once testing had pinpointed onions — and not hamburger patties — as the likely source of E. coli. The company found an alternate supplier and resumed selling Quarter Pounders with slivered onions at all U.S. stores last month.

McDonald’s last major food-safety issue happened in 2018, when more than 500 people contracted an intestinal illness after eating its salads.

McDonald’s also declined to comment Tuesday on legal action against the company as a result of the E. coli outbreak.

Nicole and Richard West of Townsend, Montana, are suing McDonald’s after their 11-month-old daughter, Logan, was hospitalized in October with E. coli poisoning. The toddler ate a few bites of her father’s Quarter Pounder hamburger with onions during a family road trip on Oct. 2.

She fell ill a few days later with severe vomiting and diarrhea. Her mother rushed her to the hospital, where she was found to be infected with E. coli O157:H7, which can cause life-threatening illness, particularly in young children.

Richard West also fell ill but didn’t seek medical attention because he was at home caring for the family’s other children. He lost more than two weeks of work as a truck driver because of the outbreak and the family faces a barrage of medical expenses.

Nicole West said Tuesday that Logan’s health has improved but the outbreak has shaken the family’s confidence in the fast-food giant.

“With kids, when you want to go out to eat, they want to go to McDonald’s. They want to get a Happy Meal,” West said. “But we just don’t trust it anymore.”