"The issue appears to be contained to a particular ingredient and geography, and we remain very confident that any contaminated product related to this outbreak has been removed from our supply chain and is out of all McDonald's restaurants," a McDonald's spokesperson said.
McDonald's confirmed in a statement to ABC News that Taylor Farms is the supplier of the onions and said that it had stopped using them as of Oct. 22. Currently, there have been 26 reported cases in Colorado, which remains the most impacted state, and 13 in Montana. Other cases have been reported in Idaho, Iowa, Kansas, Michigan, Missouri, Nebraska, Nevada, New Mexico, Oklahoma, Oregon, Utah, Washington, Wisconsin and Wyoming.Mario Tama/Getty Images
"We are committed to making this right for any customers who have eaten at McDonald's and suffered an illness as a result of the outbreak," the statement says, without elaboration.