The size distribution of airborne bacteria and human pathogenic bacteria in a commercial composting plant
文献类型： 外文期刊
作者： Gao, Min 1 ; Yang, Ziye 1 ; Guo, Yajie 1 ; Chen, Mo 1 ; Qiu, Tianlei 1 ; Sun, Xingbin 2 ; Wang, Xuming 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Agrobiotechnol Res Ctr, Beijing Key Lab Agr Genet Resources & Biotechnol, Beijing 100097, Peoples R China
2.Northeast Forestry Univ, Coll Forestry, Harbin 150040, Peoples R China
关键词： Size distribution; Airborne bacteria; Biological diversity; Human pathogenic bacteria; Composting plants
期刊名称：FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING （ 影响因子：4.357； 五年影响因子：3.688 ）
ISSN： 2095-2201
年卷期： 2021 年 15 卷 3 期
页码：
收录情况： SCI
摘要： Composting plants are regarded as one of the important sources of environmental bioaerosols. However, limitations in the size distribution of airborne bacteria have prevented our comprehensive understanding of their risk to human health and their dispersal behavior. In this study, different sizes of airborne bacteria were collected using an eight-stage impactor from a full-scale composting facility. Size-related abundance and communities of airborne bacteria as well as human pathogenic bacteria (HPB) were investigated using 16S rRNA gene sequencing coupled with droplet digital PCR. Our results indicate that the bacterial concentrations from the eight stages were approximately 10(4)-10(5) copies/m(3). Although no statistical correlation was detected between the particle size and the Shannon index, the influence of size on bacterial lineages was observed in both composting and packaging areas. For airborne bacteria from different stages, the dominant phyla were Firmicutes, Proteobacteria, and Actinobacteria, and the dominant genera was Bacillus. Seven out of eight HPB with a small geometric mean aerodynamic diameter had a high concentration in composting areas. Based on diameters of 2.42 to 5.09 mu m, most HPB in the composting areas were expected to be deposited on the bronchus and secondary bronchus. However, in the packaging areas, the deposition of HPB (diameters 3.70 to 8.96 mu m) occurred in the upper part of the respiratory tract. Our results on the size distribution, abundance, and diversity of these bacteria offer important information for the systematic evaluation of bacterial pathogenicity and the potential health impacts on workers in composting plants and the surrounding residents. (c) Higher Education Press 2020
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