Health impacts of an extreme dust event: a case and risk assessment study on airborne bacteria in Beijing, China

作者：Yueyun Luo, Qiao Yao, Pei Ding, Min Hou, Fuchang Deng, Youbin Wang, Cheng Ding, Li Xia, Duochun Wang, Zongke Sun, Song Tang, Yixin Mao, Xiaoyuan Yao · 发表于：Environmental Sciences Europe · 年份：2024 · DOI：10.1186/s12302-024-00858-0 · 被引用次数：13 · 研究领域：Air Quality and Health Impacts、Climate Change and Health Impacts、Indoor Air Quality and Microbial Exposure

Abstract Dust events are concerning due to their potential to cause environmental pollution and health issues by carrying numerous particles from various regions. However, the risks of airborne bacteria from dust have not yet been thoroughly investigated. This study aimed to reveal the particle size distribution, antibiotic resistance, microbial community structure, and diversity of airborne bacteria by using culture methods, and assess the potential health risks by calculating the dose expectation $$(\overline{d })$$ ( d ¯ ) , daily short-term intake (STI), and Hazard Index (HI) during an extreme dust event in urban Beijing (China). Airborne bacteria were sampled before, during, and the day after a severe dust event in March 2021 in Beijing using the six-stage impactor. The major findings were as follows: (1) airborne bacterial concentration increased during the dust event, and inhalable bacteria account for 67.93%. The Hazard Index (HI) of cultivable and inhalable airborne bacteria in men, women, and children exposed to dust events was up to 1.42 and 1.54 times higher than that in individuals who were not exposed, respectively. HI was 1.52 times higher in children than in men when exposed to the dust event. (2) The percentage of Gram-positive bacteria (GPB) resistant to different antibiotics was altered. The abundance of ciprofloxacin-resistant bacteria increased by 24.51%, while that of clindamycin-resistant bacteria decreased by 34.64%. The $$\overline...