title: An outbreak of Legionnaires' disease in a Swedish hospital.
abstract: We report a nosocomial outbreak of Legionella pneumophila serogroup (sg) 1 infection at the general hospital, Värnamo, Sweden. From December 1990 to February 1991, 28 patients and 3 staff fell ill with pneumonia and 3 died. L. pneumophila sg 1 together with several other Legionellae were isolated from the hot water supply to 17 of 20 hospital wards, probably being spread by aerosolization via shower nozzles. Raising the hospital's hot water temperature from 45 degrees C to 65 degrees C, together with heat disinfection of the shower equipment, arrested the outbreak within a week. Keeping the hot water temperature > or = 60 degrees C without chlorination eliminated L. pneumophila from > 75% of the wards. During a period of 2 years after the outbreak we have diagnosed only 1 case of nosocomial legionellosis at the hospital despite an active surveillance program.
authors.affiliation: Department of Infectious Diseases, Ryhov Hospital, Jönköping, Sweden.
authors.forename: J
authors.initials: J
authors.lastname: Darelid
authors.forename: L
authors.initials: L
authors.lastname: Bengtsson
authors.forename: B
authors.initials: B
authors.lastname: Gästrin
authors.forename: H
authors.initials: H
authors.lastname: Hallander
authors.forename: S
authors.initials: S
authors.lastname: Löfgren
authors.forename: B E
authors.initials: BE
authors.lastname: Malmvall
authors.forename: A M
authors.initials: AM
authors.lastname: Olinder-Nielsen
authors.forename: A C
authors.initials: AC
authors.lastname: Thelin
mesh_terms: D000368:Aged; D000900:Anti-Bacterial Agents; D001431:Bacteriological Techniques; D003428:Cross Infection / Q000453:epidemiology*; D004196:Disease Outbreaks; D004359:Drug Therapy, Combination / Q000627:therapeutic use; D005260:Female; D006769:Hospitals, General; D006801:Humans; D007877:Legionnaires' Disease / Q000188:drug therapy / Q000453:epidemiology* / Q000635:transmission; D008297:Male; D008875:Middle Aged; D013548:Sweden / Q000453:epidemiology; D014871:Water Microbiology
chemical_list: D000900:Anti-Bacterial Agents