A 53-year-old male was hospitalized on April 12th, 2002 because of an upper abdominal pain that started in the morning of April 11th and gradually worsened. Ileus
was suspected based on an X-ray of the abdomen. A medical interview revealed that the patient had eaten raw firefly squids, 2 days before the hospitalization. The abdominal symptoms disappeared in a few days during which the patient was treated
conservatively. A specimen from the patient's sera reacted with the esophageal glands in frozen sections of a type X larva of the suborder Spirurina. The infection of the type X larvae of unidentified splruroid nematodes from squids was considered to be the cause, because those larvae have recently been to reported as the cause of visceral and cutaneous. Although the infection rate in W. scintillans is relatively low, a risk of human infection with type X larvae should be taken into a consideration in the consumption of raw squids
