A report in this month's Infection Control and Hospital Epidemiology describes an outbreak of Legionellosis involving 8 patients who ended up hospitalized at two hospitals. Via good old fashioned shoe leather epidemiology, it was determined that the only common exposure among these patients was exposure to a hospital with a wall-type water fountain in the lobby. Environmental cultures revealed that the fountain was heavily contaminated with Legionella pneumophila serogroup 1. A few years ago, Dan blogged about another Legionella outbreak associated with a indoor fountain in a hospital. If your hospital has one of these, shut it down!