Scientists at the US Centers for Disease Control and Prevention who worked with the Colorado Department of Public Health and ...

Onions spread on McDonald's Quarter Pounders are the definite source of an outbreak of E. coli illness that's now affected 90 ...

Officials have said raw, slivered onions on McDonald's Quarter Pounder hamburgers are the likely source of the E. coli.

A preliminary investigation by the U.S. Food and Drug Administration suggested fresh slivered ... reported eating a beef hamburger. Twelve reported eating a Quarter Pounder. McDonald's said ...

The Centers for Disease Control reported 15 new cases of E. coli Wednesday linked to an outbreak in fresh onions used on ...

The number of cases in the E. coli outbreak linked to McDonald's Quarter Pounders has risen to 90, the CDC said in an update ...

Additional cases associated with the outbreak have also been reported, bringing the total number of illnesses to 90 and ...

Quarter Pounders without onions will return to Colorado, Kansas, Utah and Wyoming, where the burgers were removed from all ...

McDonald's has been under the radar after 75 individuals in the U.S. were infected with E. coli after eating Quarter Pounder burgers.

The U.S. Food and Drug Administration continues to believe that slivered onions from a single supplier are the likely source ...

McDonald's says testing has ruled out beef patties as the source of the outbreak of E. coli poisoning tied to its Quarter ...