: At least 75 people fell ill from the bacterial infection and one person died in Colorado from a strain of E. coli, the Centers for Disease Control and Prevention said Friday. McDonald’s attributed the illnesses to slivered onions,

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.

A California-based produce company was the source of fresh onions linked to a deadly E. coli food poisoning outbreak at McDonald’s, officials with the restaurant chain said Thursday. Meanwhile, other fast-food restaurants — including Taco Bell, Pizza Hut, KFC and Burger King — pulled onions from some menus.