More than 100 People Affected by McDonald's E.coli Outbreak Linked to Onions

Wed Jun 03 2026 18:31:53 GMT+0000 (Coordinated Universal Time)

Health officials report a significant E.coli outbreak tied to McDonald's Quarter Pounders impacting over 100 individuals.

A severe E.coli outbreak associated with slivered onions used in McDonald's Quarter Pounder burgers has resulted in 104 confirmed illnesses, leading to 34 hospitalizations and one fatality in October, as reported by U.S. health authorities. The outbreak, linked to onions supplied by Taylor Farms, prompted a safety recall after the CDC identified the onions as the probable source of the bacterial infection. Consequently, McDonald's has switched to a new onion supplier and resumed selling the Quarter Pounder at affected locations. Tests related to the outbreak are still underway, and health officials express no current food safety concerns at the chain's restaurants.

Recent reports reveal that an outbreak of E.coli linked to slivered onions in McDonald's Quarter Pounder burgers has sickened over 100 individuals across several states in the U.S. The CDC and FDA have confirmed that the bacteria, known for causing severe gastrointestinal issues, stemmed from onions supplied by Taylor Farms. Since the announcement of the outbreak, which first emerged between September 12 and October 21, more than 34 people have been hospitalized, and there has been one reported death.

McDonald's temporarily halted the sale of Quarter Pounders in approximately 20% of its locations while the company investigated the source of the contamination. In response to the incident, McDonald's has now secured a new supplier of onions and has resumed the sale of the burger with slivered onions after health officials confirmed that its beef patties were safe.

The FDA, alongside state health departments, is actively testing onion samples from McDonald's restaurants and distribution centers. So far, there have been four cases of haemolytic uremic syndrome reported, a serious complication associated with E.coli infections that can lead to kidney damage. Health officials believe the recalled onions were not made available to the general public or grocery stores.

In light of the outbreak, several consumers have initiated legal actions against McDonald's, including a proposed class-action lawsuit. Chris Kempczinski, CEO of McDonald's, extended apologies to affected customers, expressing deep sympathies and commitment to food safety. The fast-food giant emphasizes its dedication to ensuring the safety of its products and has taken significant steps to rectify the situation following the outbreak.