This study aimed to obtain basic information on the indoor environmental hygiene of non-disinfected libraries used for paper records preservation in the Nara Repository of National Archives, Korea. Microorganisms were investigated in dust samples collected from bookshelves of five libraries using the swab method. Bacterial concentration ranged from 6 CFU/m2 up to 1,730 CFU/m2 . A total of 11 bacterial species belonging to five genera were identified, with Bacillus being the predominant genus. Some bacterial species forming colonies with pigmentation on TSA media were also present. No bacterial species capable of producing cellulases were found. However, one species that could have harmful effects on human health was discovered. For fungi, concentration ranged between 6 CFU/m2 to 1,660 CFU/m2, and a total of six fungal species belonging to five genera were found. Some fungal species forming pigmented colonies on PDA media were also present. Additionally, three species that could have harmful effects on human health were identified. This study’s data suggests that microbial contamination in the dust is relatively low, but the dust in the bookshelves of non-disinfected libraries at the Nara Repository requires management. This is the first report conducted on microorganisms in the dust of bookshelves at the National Archives in Korea.

1. 서 론
2. 재료 및 방법
    2.1 먼지 시료 채집 및 미생물 배양
    2.2 미생물 분리 관찰 및 동정
3. 결과 및 고찰
    3.1 미소독 보존서고 내 먼지 내 미생물 농도 분석
    3.2 미소독 보존서고 먼지에서 순수분리 된 미생물 동정
4. 결 론
감사의 글
References

• 김수산(단국대학교 바이오융합대학 의생명과학부) | Susan Kim (Department of Microbiology, Dankook University, Cheonan 31116, Korea)
• 노형진(단국대학교 바이오융합대학 의생명과학부) | HyeongJin Noh (Department of Microbiology, Dankook University, Cheonan 31116, Korea)
• 안금란(한국핵융합에너지연구원 플라즈마기술연구소) | Geum Ran Ahn (Institute of Plasma Technology, Korea Institute of Fusion Energy, Kusan 54004, Korea)
• 김성환(단국대학교 바이오융합대학 의생명과학부) | Seong Hwan Kim (Department of Microbiology, Dankook University, Cheonan 31116, Korea) Corresponding author