A 25-year-old man presented with acute onset of fever, abdominal pain, and hematochezia. He had had undercooked chicken five days before. On examination, the body temperature was 37.8℃ and there was tenderness on palpation at the right lower quadrant with increased bowel sounds. Laboratory examination showed white blood cells of 14,900/µL and elevated levels of C-reactive protein of 22.02 mg/dL (range, <0.14 mg/dL). A computed tomography (CT) scan showed marked thickening of the right colon (Fig. 1). Colonoscopy showed the marked inflammation of the ileocecal valve and the ascending colon (Fig. 2). A shallow and large ulcer on the ileocecal valve was noted (Fig. 3). As Campylobacter enterocolitis was suspected by the typical clinical course and imaging studies, clarithromycin was administrated. He improved in a few days and, later, standard stool culture showed negative but intraluminal fluid culture yielded Campylobacter jejuni.
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