Seventy people who say they became ill last year after eating at a Lombard Subway filed suit Monday against the restaurant chain.
The complaint filed in DuPage County accuses the Subway at 1009 E. Roosevelt Road of strict product liability, negligence and breach of warranty in connection with a food poisoning outbreak in late February 2010.
Health officials at the time said they confirmed more than 120 cases of shigella associated with the outbreak, which closed the restaurant for more than six weeks.
The lawsuit names plaintiffs in Cook, DuPage, Kane, Kendall, Lake and Will counties, as well as Wisconsin.