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Pubmed ID :29864633
Publication Date : //

Control and prevention measures for legionellosis in hospitals: A cross-sectional survey in Italy.


Risk assessment, environmental monitoring, and the disinfection of water systems are the key elements in preventing legionellosis risk. The Italian Study Group of Hospital Hygiene of the Italian Society of Hygiene, Preventive Medicine, and Public Health and the Italian Multidisciplinary Society for the Prevention of Health Care-Associated Infections carried out a national cross-sectional survey to investigate the measures taken to prevent and control legionellosis in Italian hospitals. A multiple-choice questionnaire was developed, comprising 71 questions regarding hospital location, general characteristics, clinical and environmental surveillance, and control and preventive measures for legionellosis in 2015. Overall, 739 hospitals were enrolled from February to June 2017, and 178 anonymous questionnaires were correctly completed and evaluated (response rate: 24.1%). The survey was conducted using the SurveyMonkey® platform, and the data were analyzed using Stata 12 software. Of the participating hospitals, 63.2% reported at least one case of legionellosis, of which 28.2% were of proven nosocomial origin. The highest case numbers were reported in the Northern Italy, in hospitals with a pavilion structure or cooling towers, and in hospitals with higher numbers of beds, wards and operating theaters. Laboratory diagnosis was performed using urinary antigen testing alone (31.9%), both urinary antigen testing and single antibody titer (17.8%), or with seroconversion also added (21.5%). Culture-based or molecular investigations were performed in 28.8% and 22.1% of the clinical specimens, respectively. The water systems were routinely tested for Legionella in 97.4% of the hospitals, 62% of which detected a positive result (> 1000 cfu/L). Legionella pneumophila serogroup 2-15 was the most frequently isolated species (58.4%). The most common control measures were the disinfection of the water system (73.7%), mostly through thermal shock (37.4%) and chlorine dioxide (34.4%), and the replacement (69.7%) or cleaning (70.4%) of faucets and showerheads. A dedicated multidisciplinary team was present in 52.8% of the hospitals, and 73% of the hospitals performed risk assessment. Targeted training courses were organized in 36.5% of the hospitals, involving nurses (30.7%), physicians (28.8%), biologists (21.5%), technicians (26.4%), and cleaners (11%). Control and prevention measures for legionellosis are present in Italian hospitals, but some critical aspects should be improved. More appropriate risk assessment is necessary, especially in large facilities with a high number of hospitalizations. Moreover, more sensitive diagnostic tests should be used, and dedicated training courses should be implemented.

Authors : Montagna Maria Teresa , De Giglio Osvalda , Napoli Christian , Diella Giusy , Rutigliano Serafina , Agodi Antonella , Auxilia Francesco , Baldovin Tatjana , Bisetto Francesco , Arnoldo Luca , Brusaferro Silvio , Busetti Marina , Calagreti Gioia , Casini Beatrice , Cristina Maria Luisa , Di Luzio Rossano , Fiorio Maurizio , Formoso Maurizio , Liguori Giorgio , Martini Enrica , Molino Andrea , Mondello Placido , Mura Ida , Novati Roberto , Orsi Giovanni Battista , Patroni Andrea , Poli Anna , Privitera Gaetano , Ripabelli Giancarlo , Rocchetti Andrea , Rose Francesco , Sarti Mario , Savini Sandra , Silvestri Antonio , Sodano Luisa , Spagnolo Anna Maria , Tardivo Stefano , Teti Valeria , Torregrossa Maria Valeria , Torri Emanuele , Veronesi Licia , Zarrilli Raffaele , Pacifico Claudia , Goglio Antonio , Moro Matteo , Pasquarella Cesira ,

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