Federal officials say E. coli food poisoning linked to McDonald’s Quarter Pounder hamburgers has sickened at least 49 people in 10 states.

The CDC is investigating an E. coli outbreak that has sickened 49 people in 10 states, including one person who has died.

The fast food giant's Quarter Pounder burgers have been linked to 49 E. coli infections and one death across 10 states.

By Ananya Mariam Rajesh (Reuters) -Shares of McDonald's fell nearly 6% in premarket trading on Wednesday after an E. coli outbreak linked to the restaurant chain's Quarter Pounder hamburgers resulted in the death of one person and sickened 49 people in the U.

The Centers for Disease Control and Prevention said on Tuesday that the “severe” E. coli outbreak had infected 49 people, leaving 10 in hospital and one elderly person dead. Everyone interviewed by authorities investigating the outbreak reported having eaten McDonald’s before falling ill.