title: Legionnaire's disease.
mesh_terms: D004196:Disease Outbreaks; D006801:Humans; D007659:Ketones / Q000506:poisoning*; D007877:Legionnaires' Disease / Q000453:epidemiology*; D009532:Nickel / Q000506:poisoning*; D010414:Pennsylvania
chemical_list: D007659:Ketones; D009532:Nickel