[논문]착용자 환경 및 시간에 대한 마스크 미생물 오염 연구

서혜경; 권영일; 이성연; 강병갑; 명준표; 장호영; 김희주; 심수아; 박성욱

doi:10.15269/jksoeh.2021.31.4.427

착용자 환경 및 시간에 대한 마스크 미생물 오염 연구
A Study on the Mask Microbial Contamination by Working Environment and Wearing Time 원문보기

한국산업보건학회지 = Journal of Korean Society of Occupational and Environmental Hygiene, v.31 no.4, 2021년, pp.427 - 439

서혜경 (신한대학교 바이오생태보건대학) , 권영일 (신한대학교 바이오생태보건대학) , 이성연 (동남보건대학교) , 강병갑 (한국한의학연구원) , 명준표 (가톨릭대학교 서울성모병원) , 장호영 (신한대학교 바이오생태보건대학) , 김희주 (신한대학교 바이오생태보건대학) , 심수아 (신한대학교 바이오생태보건대학) , 박성욱 (신한대학교 바이오생태보건대학)

Abstract ▼ AI-Helper

Objectives: This study aims to investigate differences in microbial contamination according to the duration and environment of mask wearing. Methods: Forty-five participants were recruited from workers in an offices, multi-purpose facilities, and a schools. After wearing of KF94 mask for two. four, and six hours, the microorganisms adsorbed on the outer and inner layers of the mask were inoculated on BAP(Blood Agar Plate), Chocolate agar, and SDA plates. The bacterial count (CFUs: colony-forming units) cultured in each plate was measured and analyzed for changes in filtration efficiency. Results: The microbial contamination of masks worn in classrooms, offices, and multi-purpose facilities showed a significant difference depending on the environment (p<0.000). The measured CFUs increased significantly according to the time wearing the mask. The difference between the inner and outer layers of the mask was also significant (p<0.05). However, there was no statistical difference in the filtration efficiency of the masks by duration time (p=0.515). Conclusions: Masks worn by workers in the offices, multi-purpose facilities, and schools showed an increase of microbial contamination with the amount of time wearing the mask. The results indicate that the masks used in daily life may have adverse health effects if they are worn for a long time or reused over several days without the realizing that the masks can be contaminated with biological hazards. Guidelines on the safe threshold time for mask use should be established through further research.

주제어

표/그림 (10)

그림 Figure 1. Test mask and three-layer structure
표 Table 1. Result of survey
표 Table 2. Bacterial status by environment (N=540)
그림 Figure 2. CFU comparison for inner and outer surface of mask(*p<0.05)
그림 Figure 3. CFU by wearing time (a: p*-value was calculated by ANOVA, b: p*-value was calculated by Wilcoxon signed rank test)
표 Table 3. Bacterial contamination after mask wearing (N=540)
그림 Figure 4. Comparison of microbial contamination
표 Table 4. Cultured microbial strains by environment
그림 Figure 5. Microbial colony cultured with BAP, chocolate agar and SDA plate
표 Table 5. Filtration efficiency by duration time (N=135)

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