McDonald’s tries to calm customer worry after E. coli outbreak [Video]

NEW YORK — McDonald’s worked Wednesday to reassure customers that its U.S. restaurants are safe as federal investigators tried to pinpoint the cause of a deadly E. coli outbreak linked to the fast food giant’s Quarter Pounder hamburgers.

McDonald’s pulled Quarter Pounders from one-fifth of its U.S. stores Tuesday as a result of the outbreak, which the U.S. Centers for Disease Control and Prevention said had sickened at least 49 people in 10 states. One person died and 10 were hospitalized, according to the CDC.

A preliminary investigation by the U.S. Food and Drug Administration suggested fresh slivered onions that are served raw on Quarter Pounder hamburgers were a likely source of the contamination. McDonald’s also serves raw, slivered onions on one of its breakfast sandwiches, but that sandwich isn’t available at the impacted stores. Other burgers, like the Big Mac, use diced, cooked onions.

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