McDonald's last week removed french fries from its gluten-free menu even though it said tests show the fries do not contain the grain protein to which some people are allergic.
McDonald's did acknowledge that the oil used to cook the fries contains gluten, the Palm Beach (Fla.) Post reported.
The parents of Annie Chimiak of Jupiter Farms, Fla., accuse McDonald's of causing their autistic daughter to suffer advanced celiac disease, stomach ulcers and seizures from the fries she ate nearly daily the past two years.
McDonald's is accused of misrepresenting "that these french fries are safe for consumption by people like Annie," attorney Brian Smith said of the Palm Beach County, Fla., suit.
"We are just a mom and a dad and a sick kid," mother Teresa Chimiak said. "But they are wrong."
"We believe the lawsuits filed are without legal merit," McDonald's Jack Daly wrote on the company's Web site.