McDonald's Quarter Pounder hamburgers linked to deadly E. coli outbreak, CDC says

McDonald's Quarter Pounder hamburgers are being linked to an outbreak of E. coli that has sickened nearly 50 people in 10 states, killing one person, federal health officials said Tuesday.  Signs of dehydration, such as:

Most sick people reported eating Quarter Pounders from McDonald's, and investigators are working to confirm which food ingredient is contaminated, according to the U.S. Centers for Disease Control and Prevention. 

A total of 49 cases have been reported so far. Most of the illnesses occurred in Colorado and Nebraska, with 26 sickened in the former and nine stricken in the latter, the CDC stated. Of the 26 sickened in Colorado, an older adult died, the CDC said.