배지 종류 및 저장 조건에 따른 impactor의 부유세균 시료 채취 효율 평가

Evaluation of Impactor s Collection Efficiency on Airborne Bacteria by Type of Agar Media and Storage Condition

The range of reduction rates of airborne bacteria concentration at 6 hrs, 12 hrs, 24 hrs and 48 hrs, which means a storage time until input of agar media into incubator after air sampling with an impactor. were 15-20%, 25-40%, 35-50% and 55-70%, respectively, compared to initial concentration. Types of agar media and storage thermal condition did not significantly affect a collection efficiency of impactor in terms of evaluating airborne bacteria level (p>0.05). To better improve the impactor s collection efficiency of airborne bacteria, based on the result of this study, it is recommended that the vicinity of 25∘C should be sustained until input of agar media into incubator after air sampling.