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Distribution and Characteristics of Microorganisms Associated with Settled Particles During Asian Dust Events
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  • Journal title : The Korean Journal of Microbiology
  • Volume 48, Issue 2,  2012, pp.134-140
  • Publisher : The Microbiological Society of Korea
  • DOI : 10.7845/kjm.2012.48.2.134
 Title & Authors
Distribution and Characteristics of Microorganisms Associated with Settled Particles During Asian Dust Events
Koh, Ji-Yun; Jang, Chan-Gook; Cha, Min-Ju; Park, Kyo-Nam; Kim, Min-Kyu; Kim, Jong-Seol;
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Asian dust storms originating in the arid desert of China and Mongolia usually occur from late winter through spring, and more than one million tons of dust per year is transported to the Korean Peninsula by the prevalent westerly winds. We supposed that these dust particles could include bioaerosols and act as carriers of microorganisms. In order to clarify the dynamics of microorganisms moving with these particles, the concentration and composition of microorganisms associated with settled particles were compared between samples collected during Asian dust events and those under non-dust periods. From February to April 2008, settled dust particles were collected at one location in Ulsan using rainfall meter of 200 mm diameter. During this period, there was one Asian dust event in Ulsan. The bacterial concentrations were higher in samples collected during Asian dust event than those under non-dust period, whereas fungal concentrations were rather similar regardless of the Asian dust event. We analyzed 16S rRNA gene sequences of 45 bacterial isolates obtained from the settled particle samples. These isolates belonged to either genus Bacillus or genus Streptococcus and were tentatively identified as B. amyloliquefaciens, B. aryabhattai, B. atrophaeus, B. licheniformis, B. megaterium, B. methylotrophicus, B. pumilus, B. sonorensis, B. subtlis, B. vallismortis, S. epidermidis, and S. succinus. In cases of fungal isolates, genera such as Mucor, Alternaria, Cladosporium, and Aspergillus were tentatively identified from samples collected at both Asian dust and non-Asian dust periods. It appears that endospore-forming bacteria such as Bacillus sp. rather than fungal spores are more likely to be associated with Asian dust particles.
Asian dust;bacteria;fungi;settled particle;
 Cited by
의류쇼핑센터 근로자의 분진 및 부유미생물에 대한 노출평가,오성업;김기연;

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