Table 3.

Prevalence rate of microorganisms according to risk stratification-based sampling sites

^*Critical airway equipments were intubation tube and laryngeal mask airway cuff. Semi-critical airway equipments were laryngoscope blade, suction tip, water in suction bottle and oropharyngeal airway. Laryngoscope handle was classified into noncritical equipment. All breathing devices were semi-critical group. Circulation, and other devices, ambulance apparatus, and driver's side was non-critical group. 1) One Extended spectrum beta lactamase (ESBL) positive-K. pneumoniae was cultured in water of suction bottle among airway equipment; 2) One ESBL positive-K. pneumoniae was cultured in BVM bag among breathing equipment; 3) One Methicillin resistant Coagulase Negative Staphylococcus was cultured in stretcher car side bar; 4) One Methicillin resistant Staphylococcus aureus was cultured in driver's side door handle; ^†95% confidence interval.