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Italian multicentre study on microbial environmental contamination in dental clinics: a pilot study

Pasquarella, Cesira Isabella Maria and Veronesi, Licia and Castiglia, Paolo Giuseppino and Liguori, Giorgio and Montagna, Maria Teresa and Napoli, Christian and Rizzetto, Rolando and Torre, Ida and Masia, Maria Dolores and Di Onofrio, Valeria and Colucci, Maria Eugenia and Tinteri, Carola and Tanzi, Maria Luisa (2010) Italian multicentre study on microbial environmental contamination in dental clinics: a pilot study. Science of The Total Environment, Vol. 408 (19), p. 4045-4051. eISSN 1879-1026. Article.

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DOI: 10.1016/j.scitotenv.2010.05.010

Abstract

The dental practice is associated with a high risk of infections, both for patients and healthcare operators, and the environment may play an important role in the transmission of infectious diseases. A microbiological environmental investigation was carried out in six dental clinics as a pilot study for a larger multicentre study that will be performed by the Italian SItI (Society of Hygiene, Preventive Medicine and Public Health) working group "Hygiene in Dentistry". Microbial contamination of water, air and surfaces was assessed in each clinic during the five working days of the week, before and during treatments. Air and surfaces were also examined at the end of the daily activity. A wide variation was found in microbial environmental contamination, both within the participating clinics and relative to the different sampling times. Microbial water contamination in Dental Unit Water Systems (DUWS) reached values of up to 26 × 104 cfu/mL (colony forming units per millilitre). P. aeruginosa was found in 33% of the sampled DUWS and Legionella spp. in 50%. A significant decrease in the Total Viable Count (TVC) was recorded during the activity. Microbial air contamination showed the highest levels during dental treatments and tended to decrease at the end of the working activity (p < 0.05). Microbial buildup on surfaces increased significantly during the working hours. As these findings point out, research on microbial environmental contamination and the related risk factors in dental clinics should be expanded and should also be based on larger collections of data, in order to provide the essential knowledge aimed at targeted preventive interventions.

Item Type:Article
ID Code:5588
Status:Published
Refereed:Yes
Uncontrolled Keywords:Dental clinic, dental unit water system, air, surfaces, microbial contamination, monitoring, Legionella spp.
Subjects:Area 06 - Scienze mediche > MED/42 Igiene generale e applicata
Divisions:001 Università di Sassari > 03 Istituti > Igiene e medicina preventiva
Publisher:Elsevier
eISSN:1879-1026
Additional Information:Tra gli autori figura: SItI working group "Hygiene in Dentistry" c/o Department of Public Health University of Parma
Deposited On:11 Mar 2011 11:31

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