PLE-3486

A 30-year-old male with a recent history of travel developed diarrhea with excessive flatus. Stool exam was negative. He was then made to swallow a very long string, with its one end remaining outside the mouth and its other end reaching the bowels. After 4 hours, the string was withdrawn and examined under the microscope. Parasite cells were then found attached to the string. What is your diagnosis?