E. coli from McDonald's burger in the U.S.One person died and 49 were hospitalized.

McDonald's

One person has died and 49 people are being hospitalized in 10 states after eating McDonald's hamburgers, the U.S. Centers for Disease Control and Prevention (CDC) announced.

On the 22nd local time, the CDC announced that 'O157:H7', an E. coli strain that can cause serious illness, was detected in 'Quarter Pounder Burger' sold at McDonald's branches in 10 states. The food poisoning-causing E. coli is also a variant linked to the 1993 death of four children after eating undercooked hamburgers at a Jack in the Box restaurant.

Most sick people report eating McDonald's Quarter Pounder Burger, the CDC said. "We are working quickly to determine which food ingredients are contaminated."

The outbreak has killed one person and hospitalized 49 others. In particular, Colorado and Nebraska had the highest number of cases, with the first reported case at the end of September.

The CDC added that while McDonald's determines the exact cause, some states have stopped using McDonald's beef patties and sliced onions.

McDonald's shares have been tumbling about 6% in after-hours trading since the news broke.

Reporter Lee Yu Na from Digital News Team.