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Laboratory of Serology and Microbiology applied to Hygiene

Department of Public Health and Pediatrics

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Confirmation of presumptive Legionella colonies on culture media according to ISO 11731:2017: principles, problems and practice. Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Jacopo Garlasco,Carla M Zotti. Journal of Applied Microbiology. 2023 May.

Antibody responses to BNT162b2 SARS-CoV-2 mRNA vaccine among healthcare workers and residents of long-term care facilities: A cohort study in Northern Italy. Costanza Vicentini, Carla Maria Zotti, Alessandro Roberto Cornio, Jacopo Garlasco, Noemi Marengo, Davide Meddis, Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Valerio Bordino, Maria Michela Gianino, the Collaborating Group. Health Science Reports, February 2023.

Serological Responses up to 9 Months following COVID-19 mRNA Vaccination in Residents and Health-Care Workers of Long-Term Care Facilities: A Multicenter Prospective Cohort Study in Northern Italy. Costanza Vicentini, Carla Maria Zotti, Alessandro Roberto Cornio, Jacopo Garlasco, Noemi Marengo, Davide Meddis , Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Valerio Bordino, Maria Michela Gianino and on behalf of the Collaborating Group. Vaccines 2022, 10(12), 2183;

Seroprevalence of infection-induced SARS-CoV-2 antibodies among healthcare users of Northern Italy – results from two serosurveys (October-November 2019 – September-October 2021). Costanza Vicentini, Valerio Bordino, Alessandro Roberto Cornio, Davide Meddis, Noemi Marengo, Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Gabriella Furfaro, Giulio Mengozzi, Valentina Ricucci, Giancarlo Icardi, Carla Maria Zotti. Journal of Infectious Diseases (2022).

A New Culture Method for the Detection of Non-Tuberculous Mycobacteria in Water Samples from Heater-Cooler Units and Extracorporeal Membrane Oxygenation Machines. Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Jacopo Garlasco, Antonio Curtoni, Marco Iannaccone, Carla M Zotti. Int J Environ Res Public Health. 2022 Aug 26;19(17):10645.

A cross-sectional study of SARS-CoV-2 seropositivity among healthcare workers and residents of long-term facilities in Italy, January 2021. Valerio Bordino, Noemi Marengo, Jacopo Garlasco, Alessandro Roberto Cornio, Davide Meddis, Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Maria Michela Gianino, Costanza Vicentini, Carla Maria Zott, Collaborating group.J Med Virol. 2022 Jul;94(7):3054-3062.

Chemical susceptibility testing of non-tuberculous mycobacterium strains and other aquatic bacteria: Results of a study for the development of a more sensitive and simple method for the detection of NTM in environmental samples. Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Jacopo Garlasco, Antonio Curtoni, Marco Iannaccone, Carla Maria Zotti. J Microbiol Methods. 2022 Feb;193:106405.

Does ABO blood group influence antibody response to SARS-CoV-2 vaccination? Costanza Vicentini, Valerio Bordino, Alessandro Roberto Cornio, Davide Meddis, Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Fabrizio Bert, Carla Maria Zotti. Vox Sang. 2022 May;117(5):754-755.

The use of BCYE medium for the detection of Legionella in environmental water samples: an appropriate update to ISO 11731:2017 standard? Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Jacopo Garlasco, Carla M Zotti. Diagn Microbiol Infect Dis. 2022 Feb;102(2):115593.

Pertussis immunisation during pregnancy: Antibody levels and the impact of booster vaccine. Jacopo Garlasco, Valerio Bordino, Noemi Marengo, Erika Rainero, Alessandro Scacchi, Savina Ditommaso, Monica Giacomuzzi, Fabrizio Bert, Carla Maria Zotti.Vaccine. 2021 Aug 16;39(35):4957-4963.

Comparison of BCYEa+AB agar and MWY agar for detection and enumeration of Legionellaspp. in hospital water samples. Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Jacopo Garlasco, Carla M Zotti. BMC Microbiol. 2021 Feb 16;21(1):48.

Persistence of Legionella in Routinely Disinfected Heater-Cooler Units and Heater Units assessed by Propidium Monoazide qPCR. Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Jacopo Garlasco, Carla M Zotti. Pathogens. 2020 Nov 23;9(11):978.

Real-time PCR, the best approaches for rapid testing for Mycobacterium chimaera detection in heater cooler units and extracorporeal membrane oxygenation. Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Carla M Zotti. Perfusion. 2020 Oct 15;267659120963878.

Failure to eradicate non-tuberculous mycobacteria upon disinfection of heater-cooler units: results of a microbiological investigation in northwestern Italy. Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Carla M Zotti. J Hosp Infect. 2020 Nov;106(3):585-593.

Sensitivity and Selectivity of Two Commercially Available Media for Legionella spp. Recovery from Environmental Water Samples. Savina Ditommaso, Monica Giacomuzzi, Gabriele Memoli, Jacopo Garlasco, Carla M Zotti. Pathogens. 2020 Jun 29;9(7):523.

Using Microbiological Sampling to Evaluate the Efficacy of Nasofibroscope Disinfection: The Tristel Trio Wipes System in Ear-Nose-Throat (ENT) Endoscopy. Savina Ditommaso, Monica Giacomuzzi, Raffaella Cipriani, Teresa Zaccaria, Rossana Cavallo, Valeria Boggio, Roberto Albera, Carla M Zotti. Int J Environ Res Public Health . 2019 Nov 19;16(22):4583.

Reduction of turnaround time for non-tuberculous mycobacteria detection in heater-cooler units by propidium monoazide-real-time polymerase chain reaction. S Ditommaso, M Giacomuzzi, G Memoli, R Cavallo, A Curtoni, M Avolio, C Silvestre, C M Zotti. J Hosp Infect. 2020 Mar;104(3):365-373.

Colonization of Dental Unit Waterlines by Helicobacter pylori: Risk of Exposure in Dental Practices. Monica Giacomuzzi, Carla M Zotti, Savina Ditommaso Int J Environ Res Public Health. 2019 Aug 19;16(16):2981.

Colonization by Pseudomonas aeruginosa of dental unit waterlines and its relationship with other bacteria: suggestions for microbiological monitoring
Savina Ditommaso, Monica Giacomuzzi, Elisa Ricciardi, Gabriele Memoli, Carla M Zotti. J Water Health. 2019 Aug;17(4):532-539.

"Guidelines for the prevention and control of legionnaire's disease in Italy": guidelines or guidance? S Ditommaso, M Giacomuzzi, E Ricciardi, C M Zotti. J Biol Regul Homeost Agents. Sep-Oct 2018;32(5):1311-1315.

Experimental Study to Develop a Method for Improving Sample Collection to Monitor Laryngoscopes after Reprocessing. Savina Ditommaso, Monica Giacomuzzi, Elisa Ricciardi, Carla Zotti. Clin Endosc. 2018 Sep;51(5):463-469.

The role of chemical products at low doses in preventing the proliferation of bacteria in dental unit waterlines: the ICX ® experience. Savina Ditommaso, Monica Giacomuzzi, Elisa Ricciardi, Roberto Garbuio, Carla M Zotti. J Water Health. 2018 Feb;16(1):150-158.

Efficacy of a Low Dose of Hydrogen Peroxide (Peroxy Ag+) for Continuous Treatment of Dental Unit Water Lines: Challenge Test with Legionella pneumophila Serogroup 1 in a Simulated Dental Unit Waterline. Savina Ditommaso, Monica Giacomuzzi, Elisa Ricciardi, Carla M Zotti. Int J Environ Res Public Health. 2016 Jul 22;13(5):745.

Cultural and Molecular Evidence of Legionella spp. Colonization in Dental Unit Waterlines: Which Is the Best Method for Risk Assessment? Savina Ditommaso, Monica Giacomuzzi, Elisa Ricciardi, Carla M Zotti. Int J Environ Res Public Health. 2016 Feb 6;13(2):211.

Viability-qPCR for detecting Legionella: Comparison of two assays based on different amplicon lengths. Savina Ditommaso, Monica Giacomuzzi, Elisa Ricciardi, Carla M Zotti. Mol Cell Probes. 2015 Aug;29(4):237-43.

Overestimation of the Legionella spp. load in environmental samples by quantitative real-time PCR: pretreatment with propidium monoazide as a tool for the assessment of an association between Legionella concentration and sanitary risk. Savina Ditommaso, Elisa Ricciardi, Monica Giacomuzzi, Susan R Arauco Rivera, Adriano Ceccarelli, Carla M Zotti. Diagn Microbiol Infect Dis. 2014 Dec;80(4):260-6.

Legionella in water samples: how can you interpret the results obtained by quantitative PCR? Savina Ditommaso, Elisa Ricciardi, Monica Giacomuzzi, Susan R Arauco Rivera, Carla M Zotti. Mol Cell Probes. 2015 Feb;29(1):7-12.

Virulence of Legionella pneumophila strains isolated from hospital water system and healthcare-associated Legionnaires’ disease in Northern Italy between 2004 and 2009. Savina Ditommaso, Monica Giacomuzzi, Susan R Arauco Rivera, Roberto Raso, Pierangela Ferrero, Carla M Zotti. BMC Infect Dis. 2014 Sep 5;14:483.

Does better identification of the Legionella pneumophila serogroup 1 strains by Sequence-Based Typing (SBT) allow for the implementation of more effective contamination control strategies and more targeted intervention measures? Savina Ditommaso, Monica Giacomuzzi, Susan R.Arauco Rivera, Carla M.Zotti. Microchemical Journal Volume 115, July 2014, Pages 126-129.

Recovery of Legionella species from water samples using an internal method based on ISO 11731: suggestions for revision and implementation. Savina Ditommaso, Marino Gentile, Monica Giacomuzzi, Carla Maria Zotti. Diagn Microbiol Infect Dis. 2011 Jun;70(2):200-6.

La Legionella nei Rifugi di Montagna raccomandazioni per la prevenzione e il controllo delle infezioni da Legionella. E. Donegani, C. Zotti, S. Ditommaso, M.V.Stefanetti. NORME UFFICIALI della COMMISSIONE MEDICA UIAA VOL: 19.

Evaluation of the usefulness of a new direct immunofluorescence assay (ScanVIT-Legionella) for monitoring hospital water systems contaminated with Legionella spp. S Ditommaso, M Giacomuzzi, M Gentile, C M Zotti. Lett Appl Microbiol. 2010 Apr;50(4):341-6.

Effective environmental sampling strategies for monitoring Legionella spp contamination in hot water systems. Savina Ditommaso, Monica Giacomuzzi, Marino Gentile, Angela Ruggenini Moiraghi, Carla M Zotti. Am J Infect Control. 2010 Jun;38(5):344-9.

Raccomandazioni per la sorveglianza, la prevenzione e il controllo delle polmoniti da legionella nelle strutture sanitarie piemontesi pubbliche e private (marzo 2008). Gruppo di lavoro della Regione Piemonte: Bernasconi A., Ditommaso S., Marchiaro G., Moiraghi Ruggenini A., Raso R., Serra R., Stefanetti MV., Zotti CM et al

Antibody detection and cross-reactivity among species and serogroups of Legionella by indirect immunofluorescence test. S Ditommaso, M Giacomuzzi, M Gentile, C M Zotti. J Microbiol Methods. 2008 Oct;75(2):350-3.

Prevalence of anti-legionella antibodies among Italian hospital workers. P Borella, A Bargellini, I Marchesi, S Rovesti, G Stancanelli, S Scaltriti, M Moro, M T Montagna, D Tatò, C Napoli, M Triassi, S Montegrosso, F Pennino, C M Zotti, S Ditommaso, M Giacomuzzi. J Hosp Infect. 2008 Jun;69(2):148-55.

Legionella colonization of the respiratory tract in patients without nosocomial exposure. Savina Ditommaso, Monica Giacomuzzi, Marino Gentile, Angela Ruggenini Moiraghi, Roberto Arione, Sergio Baldi, Paolo Solidoro, Adriano Ceccarelli, Carla M Zotti. Infect Control Hosp Epidemiol. 2008 May;29(5):470-1.

Incidence of legionellosis in hospitals contaminated by Legionella pneumophila other than serogroup 1. S Ditommaso, M Giacomuzzi, C Biasin, M Gentile, G Maggiorotto, A Ruggenini Moiraghi, C M Zotti, Legionellosis Collaborating Group. Infect Control Hosp Epidemiol. 2007 Apr;28(4):509-11.

Colonization of a water system by Legionella organisms and nosocomial legionellosis: a 5-year report from a large Italian hospital. S Ditommaso, C Biasin, M Giacomuzzi, C M Zotti, R Arione, E Guglielmi, S Barbaro, A Di Leo, R Serra, G Marchiaro, A Ruggenini Moiraghi. Infect Control Hosp Epidemiol. 2006 May;27(5):532-5.

Peracetic acid in the disinfection of a hospital water system contaminated with Legionella species. Savina Ditommaso, Cinzia Biasin, Monica Giacomuzzi, Carla Maria Zotti, Alberto Cavanna, Angela Ruggenini Moiraghi. Infect Control Hosp Epidemiol. 2005 May;26(5):490-3.

Prevenzione della legionellosi: confronto tra linee guida europee ed extraeuropee. Ditommaso S, Biasin C, Giacomuzzi M, Zotti CM, Ruggerini A, Moiraghi A. GIIO GIORNALE ITALIANO DELLE INFEZIONI OSPEDALIERE. 2003; Vol. X pag. 7-24

Valutazione dell'efficacia di interventi di disinfezione di impianti idrici ospedalieri contaminati da legionella. Guidetti L., Ditommaso S., Giacomuzzi M., Vallana M., Zilio M., Pepe N., Zotti C.M., Maiello C.A., Vioglio R., Moiraghi Ruggenini A. GIIO GIORNALE ITALIANO DELLE INFEZIONI OSPEDALIERE. 2000; Vol. 7 pag. 97-103

Contaminazione da Legionella degli impianti idrici degli ospedali piemontesi. Ditommaso S., Guidetti L., Giacomuzzi M., Vallana M., Ghia C., Pepe N., Maiello A., Zotti C., Vioglio R., Moiraghi A.View & Review - Gennaio 2000

Legionella pneumophila in a hospital in Torino, Italy. A retrospective one-year study. A Moiraghi Ruggenini, M Castellani Pastoris, P J Dennis, C Barral, A Sciacovelli, F Carle, M Bolgiani, G Passarino, M G Mingrone, C Passi, et al. Epidemiol Infect. 1989 Feb;102(1):21-9.

Nosocomial legionellosis associated with use of oxygen bubble humidifiers and underwater chest drains. A Moiraghi, M Castellani Pastoris, C Barral, F Carle, A Sciacovelli, G Passarino, P Marforio. J Hosp Infect. 1987 Jul;10(1):47-50.

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