Abundance and cultivable bioaerosol transport from a municipal solid waste landfill area and its risks

Zhang, Ting; Chen, Yifei; Cai, Yiwei; Yu, Yun; Liu, Jianying; Shen, Xinlin; Li, Guiying; An, Taicheng

doi:10.1016/j.envpol.2023.121038

Cited by 9 publications

(1 citation statement)

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“…corynebacterium , and M. acinetobacter and M. mycolicibacterium , were identified as the upper-represented taxa during the microbial assembly process (Figure ), respectively. It should be noted that these HPB including Rhodococcus and Micrococus spp., capable of ready deposition in the lower respiratory tract, also were detected commonly in municipal wastewater , and solid waste. − This may imply that the source-related HPBs, together with their hosted ARGs, have high a potential of adapting to the airborne communities of landfills and WWTPs. Of particularly interest, a more conspicuous neutral-distribution pattern was observed in more ambient air settings ( P < 0.01, m > 0.2, R 2 > 0.4).…”

Section: Resultsmentioning

confidence: 99%

Metagenomic and Machine Learning Meta-Analyses Characterize Airborne Resistome Features and Their Hosts in China Megacities

Wu,

Xie,

Liu

et al. 2023

Environ. Sci. Technol.

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Urban ambient air contains a cocktail of antibiotic resistance genes (ARGs) emitted from various anthropogenic sites. However, what is largely unknown is whether the airborne ARGs exhibit site-specificity or their pathogenic hosts persistently exist in the air. Here, by retrieving 1.2 Tb metagenomic sequences (n = 136), we examined the airborne ARGs from hospitals, municipal wastewater treatment plants (WWTPs) and landfills, public transit centers, and urban sites located in seven of China’s megacities. As validated by the multiple machine learning-based classification and optimization, ARGs’ site-specificity was found to be the most apparent in hospital air, with featured resistances to clinical-used rifamycin and (glyco)peptides, whereas the more environmentally prevalent ARGs (e.g., resistance to sulfonamide and tetracycline) were identified being more specific to the nonclinical ambient air settings. Nearly all metagenome-assembled genomes (MAGs) that possessed the site-featured resistances were identified as pathogenic taxa, which occupied the upper-representative niches in all the neutrally distributed airborne microbial community (P < 0.01, m = 0.22–0.50, R 2 = 0.41–0.86). These niche-favored putative resistant pathogens highlighted the enduring antibiotic resistance hazards in the studied urban air. These findings are critical, albeit the least appreciated until our study, to gauge the airborne dimension of resistomes’ features and fates in urban atmospheric environments.

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