The onion supplier behind a deadly E. coli outbreak linked to McDonald's Quarter Pounders this past fall had numerous health and sanitation violations, including employees with unwashed hands, dirty equipment,

Federal inspectors uncovered numerous food safety issues at Taylor Farms' Colorado facility, including equipment found with "large amounts of food debris."

U.S. Food and Drug Administration (FDA) officials have uncovered dozens of violations at a McDonald's supplier tied to last year's deadly E.coli outbreak, which sickened over 100 people and led to a massive recall of onions used in the fast-food giant's signature Quarter Pounder burgers.