Microbiological evaluation and antibiotic susceptibility of dental unit water systems in general dental practice

International Journal of Dental Hygiene
A UzelO Oncag

Abstract

The microbial quality of water in a dental unit water systems (DUWS) is of considerable importance because patients and dental staff are regularly exposed to water and aerosol generated from the dental units. The objective of this study was to evaluate the 20 DUWS in general dental practices and to determine the antibiotic susceptibility of the colonizing bacteria. Three water and one biofilm samples from each DUWS were investigated for total viable count (TVC), oral streptococci, Pseudomonas spp., Enterobacteria, Candida albicans and Legionella pneumophila. A total of 44 morphologically different colonies were obtained from water samples and 20 types of colonies (45.5%) could be identified using API test strips. The mean TVC values were 4.36 log CFU ml(-1) for source waters, 4.95 log CFU ml(-1) for 3-in-1 syringe samples, 4.91 log CFU ml(-1) for air rotor samples and 3.66 log CFU cm(-2) for biofilm samples. Susceptibilities of the isolates were tested against piperacillin, ampicillin, ceftazidime, meropenem, gentamicin, tetracycline, ofloxacin and chloramphenicol by using microdilution method according to NCCLS. The meropenem and ofloxacin have shown the broadest spectrum against to the tested isolates. The study emphasizes th...Continue Reading

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Citations

Aug 18, 2012·Environmental Monitoring and Assessment·Jolanta Szymańska, Jolanta Sitkowska
Mar 14, 2009·The Journal of General and Applied Microbiology·Katsunori FuruhataMasafumi Fukuyama
Nov 8, 2013·Environmental Monitoring and Assessment·Nihal Dogruöz GüngörOya Öztan Peker
May 7, 2013·Future Microbiology·Jolanta Szymańska, Jolanta Sitkowska
Jan 29, 2014·Environmental Monitoring and Assessment·Duygu Göksay Kadaifciler, Aysin Cotuk
Feb 17, 2009·Journal of Basic Microbiology·Iram Liaqat, Anjum Nasim Sabri
Jan 27, 2019·International Journal of Environmental Research and Public Health·Jessica LizzadroSandra Cristino
May 12, 2021·Antimicrobial Resistance and Infection Control·Wing-Kee YiekAlma Tostmann

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