Pneumonia associated with a dental unit waterline

Department of Infectious Parasitic and ImmuneMediated Diseases, Istituto Superiore di Sanita, Rome, Italy (M L Ricci BiolD, S Fontana PhD, F Pinci BiolD, M Scaturro PhD); Azienda Unita Sanitaria Locale, Forli, Italy (E Fiumana MD); Azienda Unita Sanitaria Locale, Cesena, Italy (M F Pedna BiolD); Agenzia Regionale Prevenzione e Ambiente, Bologna, Italy (M A Bucci Sabattini BiolD); and “G B Morgagni-Pierantoni” Hospital, Department of Emergency Anaesthesia and Intensive Care Unit, Forli, Italy (P Farolfi MD)