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Title: Enrichment cultures should be performed in the detection of bacterial oral human pathogens in DUWLs
Author: Ruiz, L.
López, L.
Fenosa, A.
Veiga Crespo, Patricia
Villa, Tomás G.
Viñas, Miquel
Vinuesa Aumedes, Teresa
Keywords: Contaminació de l'aigua
Aparells i instruments odontològics
Bacteris patògens
Water pollution
Dental instruments and apparatus
Pathogenic bacteria
Issue Date: 2007
Publisher: Groupement International pour la Recherche Scientifique en Stomatologie et Odontologie
Abstract: Water delivered by dental units during routine dental practice is densely contaminated by bacteria. The aim of this study was to determine actual isolation of the microorganisms sprayed from Dental Unit Water Lines (DUWLs) when enrichment cultures are performed and to compare frequencies with those obtained without enrichment cultures. Moreover, the antimicrobial susceptibilities of the microorganisms isolated were also studied. Water samples were collected from one hundred dental equipments in use at Dental Hospital of our University in order to evaluate the presence/absence of microorganisms and to perform their presumptive identification. Aliquots from all of the samples were inoculated in eight different media including both enrichment and selective media. Minimal inhibitory concentrations (MIC) were determined by the broth dilution method. The results herein reported demonstrate that most of the DUWLs were colonized by bacteria from human oral cavity; when enrichment procedures were applied the percentage of DUWLs with detectable human bacteria was one hundred percent. The results showed that in order to evaluate the actual risk of infections spread by DUWLs the inclusion of a step of pre-enrichment should be performed. The need for devices preventing bacterial contamination of DUWLs is a goal to be achieved in the near future that would contribute to maintain safety in dental medical assistance
Note: Reproducció del document publicat a:
It is part of: Bulletin du GIRSO, 2007, vol. 48, num. 1, p. 15-21
ISSN: 0250-4693
Appears in Collections:Articles publicats en revistes (Patologia i Terapèutica Experimental)

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