What McDonald’s needs to do next after E. coli outbreak CNBCOnions Recalled in Deadly E.Coli Outbreaks Linked to McDonald’s Quarter Pounders The New York TimesE. coli Outbreak Linked to McDonald’s Quarter Pounders CDCMcDonald’s says supplier Taylor Farms is source of onions linked to E. coli outbreak NBC NewsNebraska woman sues McDonald’s over E. coli infection KETV Omaha