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KMID : 1101420150470040279
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Korean Journal of Clinical Laboratory Science
2015 Volume.47 No. 4 p.279 ~ p.285
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A Study Regarding Bacterial Contamination of Surfaces in Dental Offices
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Yun Kyoung-Ok
Kim Hye-Young
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Abstract
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This study studied samples taken off surfaces at three sites (Unit chairs, light handles, cuspidors) of 19 dental hospitals and 28 clinics located in Gyeonggi-do and Incheon, South Korea. The bacterial contamination levels of surfaces were 44.82×103 CFU/mL in cuspidors, higher than in unit chairs (5.47×103 CFU/mL) and light handles (16.28×103 CFU/mL). The values were statistically higher at dental hospitals than at dental clinics, the greater number of patients being associated with the higher bacterial cell count in the cuspidors. The results of identifying the strains isolated purely from surfaces at dental clinic showed Gram positive 47.3% and Gram negative 52.7%. Among Gram positive, the most numberous bacteria were Micrococcus luteus (10.9%), Bacillus pumilus (3.6%), and Staphylococcus aureus (3.6%). Among Gram negative, the most numberous bacteria were Acinetobacter ursingii (5.5%), Brevundimonas diminuta (4.5%), Chryseobacterium (Flavo.) indologenes (CDC IIb) (4.5%), and Methylobacterium sp. (4.5%). This study measures the level of bacterial contamination and identifies the strains isolated in dental clinics. It recognizes the importance of infection control, and the results of the study may be considered as the basis for establishing specific plans for prevention of infection.
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KEYWORD
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Bacterial contamination, Cuspidors, Dental clinics, Dental hospitals, Unit chairs
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