title: The Chicken-Egg Dilemma: Legionnaires' Disease and Retrograde Contamination of Dental Unit Waterlines.
authors.affiliation: Department of Public Health and Infectious Diseases of the Sapienza University of Rome,Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Petti
mesh_terms: D000369:Aged, 80 and over; D003748:Dental Equipment / Q000382:microbiology*; D004866:Equipment Contamination; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D016952:Legionella pneumophila / Q000302:isolation & purification*; D007877:Legionnaires' Disease / Q000175:diagnosis / Q000517:prevention & control / Q000635:transmission*; D014871:Water Microbiology