The CDC has reported 49 cases, one death and 10 hospitalizations due the outbreak.

Burger King, Taco Bell, KFC and Pizza Hut have all pulled onions from a portion of their restaurants following reports of a “severe” E. coli outbreak linked to McDonald’s Quarter Pounders.

The removal comes two days after the Centers for Disease Control and Prevention first announced in a food safety alert on its website that there was an E. coli outbreak across multiple states linked to McDonald’s Quarter Pounders.

Supplier U.S. Foods announced Wednesday that Taylor Farms had issued a recall notification for yellow jumbo peeled, diced and whole peeled onions “due to potential E. coli contamination.”