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 began in late October, sickened at least 104 people in 14 states, including 30 people in Colorado, according to the U.S. Food and Drug Administration. Thirty-four of those people were hospitalized.
One person in Colorado died after eating at a McDonald’s in Mesa County, 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.
