Endoscopic Therapy of Jejunal Diphyllobothrium nihonkaiense Infection

A 75-year-old man was referred to our hospital with persistent diarrhea. He had a habit of eating raw salmon, although he did not eat raw meat. In laboratory testing, eosinophilia (2232/μL; normal range, 100–300/μL) was detected. Abnormal findings were not observed on computed tomography. A flat creamy-white worm with numerous tile-like proglottides was found at the ileocecal valve by colonoscopy (Figures A and B). Part of the worm was sampled, and it was identified as Diphyllobothrium nihonkaiense.

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