Fungus has been regulated as an air contaminant in indoor environments in Korea. To remove the contaminant, air purifiers have been used in houses. However, not much information on the status of fungal contamination in the indoor air of houses is available. The present study was carried out to investigate fungal concentration and species in the indoor air of houses using air purifiers in winter. The results of indoor air sampling of ten houses located in the cities of Incheon, Seoul, Hwaseong, and Gimpo showed that the level of fungi ranged from 9 CFU/ m3 to 782 CFU/m3. Eight out of ten houses showed a level of less than 165 CFU/m3 indicating that the fungal level is generally low. Only one house exceeded the Korean regulatory standard value of 500 CFU/m3. A total of 175 isolates were obtained and classified as three genera belonging to Aspergillus, Cladosporium, and Penicillium. Among these three genera, 15 species including four Aspergillus spp., two Cladosporium spp., and nine Penicillium spp. were identified. Regarding the detection rate of the 15 identified fungal species, A. niger was the most detected species and followed by Cladosporium cladosporioides. Three to six species were present in the individual house that was investigated. Overall, our results showed that the level of fungal concentration and species diversity are low in the indoor air of houses that use air purifiers in winter.

Abstract
 1. 서 론
 2. 연구방법
  2.1 공기 시료 포집 및 진균 순수분리
  2.2 형태학적 및 분자생물학적 동정
 3. 결과 및 고찰
  3.1 생활 정보 및 온도와 습도
  3.2 진균 농도 비교
  3.3 진균 종 비교
 References

• 안금란(단국대학교 미생물학과) | Geum Ran Ahn (Department of Microbiology, Dankook University)
• 김수산(단국대학교 미생물학과) | Susan Kim (Department of Microbiology, Dankook University)
• 강정아(단국대학교 미생물학과) | Jung A Kang (Department of Microbiology, Dankook University)
• 김성환(단국대학교 미생물학과/단국대학교 생물다양성연구소) | Seong Hwan Kim (Department of Microbiology, Dankook University/Institute of Biodiversity, Dankook University) Corresponding author