数字农科院2.0

Insights into the Profile of the Human Expiratory Microbiota and Its Associations with Indoor Microbiotas

文献类型： 外文期刊

作者： Zhang, Yin;Shen, Fangxia;Yang, Yi;Niu, Mutong;Chen, Da;Chen, Longfei;Wang, Shengqi;Zheng, Yunhao;Sun, Ye;Zhou, Feng;Qian, Hua;Wu, Yan;Zhu, Tianle

作者机构：

关键词： microbiome;bioaerosol;exhaled breath condensate (EBC);floor dust;indoor air;exposome

期刊名称： ENVIRONMENTAL SCIENCE & TECHNOLOGY

ISSN： 0013-936X

年卷期： 2022 年 56 卷 10 期

页码：

收录情况： SCIE（2022版）

摘要： Microorganisms residing in the human respiratory tract can be exhaled, and they constitute a part of environmental microbiotas. However, the expiratory microbiota community and its associations with environmental microbiotas remain poorly understood. Here, expiratory bacteria and fungi and the corresponding microbiotas from the living environments were characterized by DNA amplicon sequencing of residents' exhaled breath condensate (EBC) and environmental samples collected from 14 residences in Nanjing, China. The microbiotas of EBC samples, with a substantial heterogeneity, were found to be as diverse as those of skin, floor dust, and airborne microbiotas. Model fitting results demonstrated the role of stochastic processes in the assembly of the expiratory microbiota. Using a fast expectation-maximization algorithm, microbial community analysis revealed that expiratory microbiotas were differentially associated with other types of microbiotas in a type-dependent and residence-specific manner. Importantly, the expiratory bacteria showed a composition similarity with airborne bacteria in the bathroom and kitchen environments with an average of 12.60%, while the expiratory fungi showed a 53.99% composition similarity with the floor dust fungi. These differential patterns indicate different relationships between expiratory microbiotas and the airborne microbiotas and floor dust microbiotas. The results here illustrated for the first time the associations between expiratory microbiotas and indoor microbiotas, showing a potential microbial exchange between the respiratory tract and indoor environment. Thus, improved hygiene and ventilation practices can be implemented to optimize the indoor microbial exposome, especially in indoor bathrooms and kitchens.

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