The CDC and FDA have closed their investigations into an E. coli outbreak linked to McDonald's Quarter Pounder hamburgers after determining there is no longer a safety risk.

The U.S. Food and Drug Adminstration issued a food safety alert in October after 49 cases of E. coli were reported

Federal health agencies closed their investigations into the bacterial outbreak that sickened 104 people and was linked to onions on the fast-food chain’s signature Quarter Pounders.

An E. coli outbreak that hit McDonald's Corp. is over, the U.S. Centers for Disease Control and Prevention said.

The federal government has closed its investigation into an E. coli outbreak tied to McDonald’s Quarter Pounder hamburgers after determining there is no longer a safety risk.

The Centers for Disease Control cleared McDonald's after its lethal E. coli outbreak, which caused one death, 34 hospitalizations and 104 cases across 14 states.

Both the CDC and FDA have said that the E. coli outbreak tied to slivered onions on Quarter Pounders no longer poses a risk to the public.

The E. coli outbreak linked to slivered onions on McDonald’s Quarter Pounder hamburgers is over, the CDC said Tuesday.