A 48-year-old man presented to a regional hospital with a 48-hour (2-day) history of generalized abdominal pain. The pain was worse in the left upper quadrant (LUQ). There was associated vomiting, loose bowel motions and the patient was in acute urinary retention. The past medical history included appendicectomy, ventral hernia repair and depression. There was no history of intravenous drug use, immunosuppression, infectious disease or travel and the patient was employed as a janitor at a local school. The patient was afebrile and the remaining vital signs were within normal limits. Abdominal examination revealed LUQ tenderness only. The white cell count was 11.5 × 10 9 /L and the C-reactive protein was 65 mg/L.