A specific ingredient has not been confirmed as the source of the outbreak, but the US Food and Drug Administration said last week that the slivered onions or beef patties on Quarter Pounder ...

It goes on to explain that McDonald's has confirmed that there is no E. coli in Quarter Pounder beef patties and has officially ruled out the patties as the source of the outbreak. On Monday ...

After an E. coli outbreak linked to McDonald’s Quarter Pounders, the fast food giant is looking to reassure customers that its beef is safe. Although onions are believed to be the culprit behind ...

The announcement comes as the Colorado Department of Agriculture reported that samples of Quarter Pounder beef taken from restaurants tested negative for E. coli. The fast food giant said that it ...

The Quarter Pounder is back on the menu after testing ... Department of Agriculture had tested multiple samples of ground beef and found no evidence of E. coli. The Colorado Department of ...

Los Angeles — McDonald's announced Sunday that Quarter Pounders will again be on its menu at hundreds of its restaurants after testing ruled out beef patties as the source of the outbreak of E.

McDonald’s announced Sunday that Quarter Pounders will again be on its menu at hundreds of its restaurants after testing ruled out beef patties as the source of the outbreak of E. coli poisoning ...