Bacterial contamination of dental units before and after disinfection

Infection control plays an important role in dental treatment and to overcome the problem of bacterial contamination that confronts dentistry, we should examine the dental treatment environment, in general, and dental units, in particular. The aim of this study is to evaluate bacterial contamination prior and subsequent to disinfection by the cleaning crew in the dental faculty of Qazvin University of Medical Science. Samples were collected from 24 randomlyselected units, each of which was divided up into seven different parts vulnerable to contamination. Sterile swabs soaked in saline were used for gathering samples from units and were placed into two types of tubes, one with saline content and the other with BHI content. The tubes were sealed and transported to a laboratory for incubation. The bacterial load was measured, and the type of bacterial content was identified. The data were analyzed using Tukey-Kramer method and ttests on SPSS 21 software (α = 0.05). The results show that despite a significant reduction in the number of colonies after disinfection, no significant difference was found between preand post-disinfection in terms of infection rates and the type of organisms. Also before and after disinfection, Staphylococcus epidermidis was the most prevalent Species (51.9%) and Enterococcus was the least (3.7%). In addition, the process of disinfection adds new microorganisms in some cases.

[1]  M. Namdari,et al.  Evaluation of the Aerobic Bacterial Contamination of Students Gowns in Restorative and Periodontics Departments of Dental School of Shahid Beheshti University of Medical Sciences in 2013 , 2015 .

[2]  Esmaeili Rasoul,et al.  EVALUATION OF EFFICACY OF NEW DISINFECTANTS: SANOSIL, ALPROCIDE, BIBFORT AND JAVEL-DOSE COMPARED WITH MICRO 10 AND DECONEX ON ISOLATED ORGANISMS FROM DENTISTRY UNITS , 2014 .

[3]  S. Kim,et al.  Distribution of pathogenic microorganisms isolated from dental hospital workers in Korea , 2013 .

[4]  R. Gmür.  Bernhard Guggenheim – Critical Mind at the Forefront of Oral Microbiology , 2012, Journal of dental research.

[5]  Henry F. Chambers,et al.  Waves of resistance: Staphylococcus aureus in the antibiotic era , 2009, Nature Reviews Microbiology.

[6]  L. Sandvik,et al.  Floor cleaning: effect on bacteria and organic materials in hospital rooms. , 2009, The Journal of hospital infection.

[7]  David J. Weber,et al.  Bacterial contamination of keyboards : Efficacy and functional impact of disinfectants , 2007 .

[8]  J. Meurman,et al.  Bacterial aerosols in dental practice – a potential hospital infection problem? , 2006, Journal of Hospital Infection.

[9]  William A Rutala,et al.  Bacterial Contamination of Keyboards: Efficacy and Functional Impact of Disinfectants , 2006, Infection Control & Hospital Epidemiology.

[10]  M. Al-Omari,et al.  Compliance with infection control programs in private dental clinics in Jordan. , 2005, Journal of dental education.

[11]  J. Cleveland,et al.  Guidelines for infection control in dental health-care settings--2003. , 2003, MMWR. Recommendations and reports : Morbidity and mortality weekly report. Recommendations and reports.

[12]  J. Cleveland,et al.  Guidelines for infection control in dental health-care settings--2003. , 2003, MMWR. Recommendations and reports : Morbidity and mortality weekly report. Recommendations and reports.

[13]  Ruby Singh,et al.  Surface contamination in the dental operatory: a comparison over two decades. , 2003, Journal of the American Dental Association.

[14]  R. Hilger.  [Non-contamination--basics of infection prevention in the dental office]. , 1989, Die Quintessenz.