McDonald's on Sunday ruled out beef patties as a source of the E. coli outbreak linked to Quarter Pounder hamburgers, which has killed at least one person and sickened nearly 75 others. "We remain very confident that any contaminated product related to this outbreak has been removed from our supply chain and is out of all McDonald's restaurants," the fast-food chain's Chief Supply Chain Officer Cesar Pina said in a statement. McDonald's will resume distribution of fresh supplies of the Quarter Pounder and t ...