By JONEL ALECCIA, AP Health Writer A deadly outbreak of E. coli poisoning tied to McDonald’s Quarter Pounders has expanded, with at least 75 people sick in 13 states, federal health officials said Friday. Twenty-two people have been hospitalized, the Centers for Disease Control and Prevention said. Two people developed a dangerous kidney disease complication, and one person died. No source of the outbreak has been identified, officials with the U.S. Food and Drug Administration said. But investigators have focused on slivered onions used on the burgers, as well as beef patties. Related Articles National News | DOJ touts cases against 4 men for threats against election officials National News | Today in History: October 25, U.S. Open champion, 5 others killed in plane crash National News | Where has the E. coli outbreak been linked to McDonald’s? See a map National News | A look at food-related illnesses at restaurants over the years National News | Today in History: October 24, D.C. Sniper apprehended McDonald’s officials have said that a California-based produce grower, Taylor Farms, supplied yellow onions that have been recalled for possible E. coli contamination. McDonald’s pulled the burger from menus in several states on Tuesday when the outbreak was announced. The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Science and Educational Media Group. The AP is solely responsible for all content.