title: A fifth serogroup of Legionella pneumophila.
mesh_terms: D000389:Air Conditioning; D001419:Bacteria / Q000302:isolation & purification*; D004196:Disease Outbreaks; D006801:Humans; D007877:Legionnaires' Disease / Q000453:epidemiology / Q000382:microbiology*; D012703:Serotyping; D013781:Texas; D014871:Water Microbiology