Colorado is at the center of what health officials say is a "fast moving" and deadly E. coli outbreak linked to McDonald's Quarter Pounder hamburgers.

One person in Colorado is dead as the result of an E. coli outbreak that involves 49 cases and is linked to McDonald’s Quarter Pounder hamburgers sold in multiple states, according to federal and state health officials.

More than 25 people in Colorado are sick after eating a hamburger at a popular fast food restaurant. The Centers for Disease Control is tracking an E. Coli outrbreak at McDonald’s across the nation. Colorado has the highest number of reported cases as of Tuesday night,

McDonald's Quarter Pounders. The CDC said 47 people have gotten sick, including 27 in Colorado. The agency said 10 people have been hospitalized and one person in Colorado died. Everyone interviewed said they ate at McDonald's before getting sick and specifically mentioned eating a Quarter Pounder hamburger,

Nationwide, 49 people have been infected with the same strain of E. coli. Most of the cases are in Colorado, however, where an older person has also died after contracting the bacteria.