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• W3120820524 endingPage "110730" @default.
• W3120820524 startingPage "110730" @default.
• W3120820524 abstract "Antibiotic resistance poses a major global health threat. Understanding emergence and dissemination of antibiotic resistance in environmental media is critical to the design of control strategies. Because antibiotic resistance genes (ARGs) may be aerosolized from contaminated point sources and disseminated more widely in localized environments, we assessed ARGs in aerosols in urban La Paz, Bolivia, where wastewater flows in engineered surface water channels through the densely populated urban core. We quantified key ARGs and a mobile integron (MI) via ddPCR and E. coli spp. as a fecal indicator by culture over two years during both the rainy and dry seasons in sites near wastewater flows. ARG targets represented major antibiotic groups—tetracyclines (tetA), fluoroquinolines (qnrB), and beta-lactams (blaTEM)—and an MI (intI1) represented the potential for mobility of genetic material. Most air samples (82%) had detectable targets above the experimentally determined LOD: most commonly blaTEM and intI1 (68% and 47% respectively) followed by tetA and qnrB (17% and 11% respectively). ARG and MI densities in positive air samples ranged from 1.3 × 101 to 6.6 × 104 gene copies/m3 air. Additionally, we detected culturable E. coli in the air (52% of samples <1 km from impacted surface waters) with an average density of 11 CFU/m3 in positive samples. We observed decreasing density of blaTEM with increasing distance up to 150 m from impacted surface waters. To our knowledge this is the first study conducting absolute quantification and a spatial analysis of ARGs and MIs in ambient urban air of a city with contaminated surface waters. Environments in close proximity to urban wastewater flows in this setting may experience locally elevated concentrations of ARGs, a possible concern for the emergence and dissemination of antimicrobial resistance in cities with poor sanitation." @default.
• W3120820524 created "2021-01-18" @default.
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• W3120820524 date "2021-03-01" @default.
• W3120820524 modified "2023-09-27" @default.
• W3120820524 title "Antimicrobial resistance genes are enriched in aerosols near impacted urban surface waters in La Paz, Bolivia" @default.
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• W3120820524 doi "https://doi.org/10.1016/j.envres.2021.110730" @default.
• W3120820524 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33444611" @default.
• W3120820524 hasPublicationYear "2021" @default.
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