Topline McDonald's will resume sale of its Quarter Pounder burgers, the company announced Sunday, after testing by authorities in Colorado ruled out the company's beef patties as the source of a large E. coli outbreak that resulted in one death and caused illnesses among at least 75 others across multiple states. McDonald's will resume the sale of its quarter pounder burgers after testing ruled out its beef ... [+] patties as a potential source of an E. coli outbreak. Getty Images Key Facts In a statement, ...