The Centers for Disease Control and Prevention (CDC) has published a update confirming that sliced ​​onions were served on McDonald’s Quarter Pounder Burgers “are the likely source” of the recent outbreak of E. coli.

With 90 cases reported, including 15 newly identified, the CDC assures the public that it believes the current risk is “very weak,” following quick actions taken by McDonald’s and its supplier, Taylor Farms.

The outbreak resulted in 27 hospitalizations and one death. Although other cases have emerged, they occurred before onions were removed from food service locations, according to the CDC. Most people affected said she ate McDonald’s Quarter Pounders, which feature the iconic sliced ​​onions, before becoming ill.

In response, McDonald’s pulled off the onions and beef patties from their menus in order to identify the source of the contamination. The fast food giant announced it would offer its Quarter Pounders Again – minus the onions.

Additionally, Burger King (QSR), with Miam! Pizza Hut, owned by brands (YUM), Taco Bell and KFC have deleted sliced ​​onions indefinitely.

The likely culprit is Taylor Farms yellow onions, which have since been recalled. Foodservice operators have been instructed to stop selling the recalled onions and “destroy» any remaining stock. It is important to note that these onions were distributed only to restaurants and therefore should not have reached grocery stores.

As the investigation continues, the CDC urges anyone experiencing symptoms of E. Coli, such as bloody diarrhea, vomiting or dehydration, to contact your doctor.

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