부산지역 치과병원의 환경과 종사자의 원내감염 세균 오염

Nosocomial Infectious Bacterial Contamination on Dental Hospital Environments and Staffs

Dental hospital environments and staffs can become contaminated with potentially variety pathogenic bacteria and have a possibility of causing cross infections. The aim of this study is to assess the identification and dissemination of dental hospital contaminated bacterial strains. We sampled computer keyboard, dental gown, light handle, mobile phone, nasal cavity, office phone, scaler, 3-way syringe, dental spittoon, handpiece, staff hands, and headrest. All the samples were cultured on blood agar plate (BAP) and MacConkey agar plate. The colonies grown on each plate were identified with matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF) using MALDI Biotyper. Sixty-three strains on BAP growth that were identified as Arthrobacter castelli (n=1), Corynebacterium pseudodiphtheriticum (n=2), Corynebacterium propinquum (n=1), Lactobacillius fructivorans (n=1), Micrococcus luteus (n=2), Staphylococcus aureus (n=11), Staphylococcus capitis (n=2), Staphylococcus epidermidis (n=34), Staphylococcus haemolyticus (n=3), and Staphylococcus warneri (n=4). Sixty-nine strains on MacConkey agar plate were identified as Acidovorax delafieldii (n=3), Acidovorax temperans (n=3), A. baumannii (n=2), Acinetobacter johnsonii (n=3), Acinetobacter lwoffii (n=3), Acinetobacter pittii (n=3), Acinetobacter radioresistens (n=1), Acinetobacter spp. (n=1), Chryseobacterium spp. (n=1), Citrobacter freundii (n=2), Comamonas testosteroni (n=1), Cupriavidus metallidurans (n=1), Delftia acidovorans (n=1), Enterobacter aerogenes (n=6), Enterobacter cancerogenus (n=1), Klebsiella oxytoca (n=2), K. pneumoniae (n=4), Klebsiella spp. (n=1), Moraxella osloensis (n=2), Moraxella spp. (n=2), P. aeruginosa (n=4), Pseudomonas asplenii (n=1), Pseudomonas entomophila (n=1), Pseudomonas jessenii (n=1) Pseudomonas luteola (n=1), Pseudomonas monteilii (n=2), Pseudomonas oryzihabitans (n=1), Pseudomonas rhodesiae (n=3), Rhizobium tumefaciens (n=1), Serratia marcescens (n=2), Sphingomonas paucimobilis (n=1), Sphingomonas spp. (n=3), Stenotrophomonas maltophilia (n=2), and Stenotrophomonas spp. (n=2). Our results showed that dental hospital environments and staffs were contaminated with variety nosocomial bacteria.