The news last week that McDonald's french fries contain wheat and milk ingredients has resulted in a lawsuit filed Friday against the Oak Brook-based company.The Chicago law firm Dale and Pakenas filed suit in a Cook County court on behalf of Debra Moffatt of Lombard, alleging consumer fraud. The suit seeks class-action status and unspecified damages.Moffatt's lawyer, Thomas Pakenas, said his client suffers from celiac disease, which interferes with the absorption of nutrients and is triggered by eating gluten, a protein found in wheat, rye and barley."You cannot sell gluten-free french fries when they have gluten," Pakenas said.