McDonald's will resume selling Quarter Pounder hamburgers in all restaurants this week, as it was informed results of testing showed no detection of E.coli in the beef patties, the U.S. fast-food giant said.

All contaminated products related to the E. coli outbreak that sickened 75 people across 13 states, with one reported fatality, are now fully out of McDonald's restaurants, the company said in a statement Sunday.

McDonald's says Quarter Pounders will be back on the menu at hundreds of its restaurants after testing ruled out beef patties as the source of an E. coli outbreak​.