A Tulsa-area girl is fighting a strain of E. coli poisoning at a Tulsa-area hospital.

More than two weeks ago, 8-year-old Cady Daugherty fell ill and her father says since then she was placed on a ventilator and is now undergoing dialysis. “She’s a fighter,” said Larry Daugherty. “She’s just been incredible with this.”

Larry believes his daughter contracted the bacteria at a Tulsa-area restaurant and he says the Tulsa Health Department is investigating. He did not comment on which restaurant may be responsible.