First announced by the agency on Tuesday, the outbreak was originally reported after sickening 49 across 10 states and killing one. As of Oct. 24, the now 75 total illnesses across 13 states included 22 hospitalizations and one death in Colorado.

The CDC said 22 people have been hospitalized from the E. coli outbreak linked to McDonald's Quarter Pounder hamburgers.

At least 75 people fell ill from the bacterial infection and one person died in Colorado from the O157:H7 strain of E. coli, the Centers for Disease Control and Prevention said Friday. McDonald’s attributed the illnesses to slivered onions, and the Food and Drug Administration indicated that onions might have been the source of the outbreak.