ArticleEnvironmental science & technology2026
Metagenomic Assessment of Full-Scale Wastewater Treatment Plants Identifies Sentinel Antibiotic Resistance Gene Families for Monitoring Reclaimed Wastewater and Treated Sludge.
Article in Environmental science & technology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The new European (EU) regulation on water reuse explicitly incorporates antimicrobial resistance (AMR) into routine monitoring and risk management, creating an urgent need to define target antibiotic resistance genes (ARGs) for reclaimed irrigation water and agricultural sludge. However, existing global data largely focus on secondary effluents, providing little actionable evidence for reuse-oriented systems. Here, we present the first integrated framework combining targeted antibiotic residue analysis with shotgun metagenomics of the resistome, mobilome, and microbiome across full-scale reuse-oriented wastewater treatment plants (WWTPs) in Southern Europe to identify sentinel antibiotic resistance families for monitoring. Reclaimed effluents exhibited lower AMR exposure levels than those typically reported for secondary effluents (<0.5 ARGs/cell), while mobile genetic element (MGE) abundances were comparable to secondary effluents (1-2 MGEs/cell). Effluent communities differed by WWTP configuration: membrane bioreactor combined with ultrafiltration favored nutrient-removal/oxidative-stress taxa and reduced transferable MGEs, whereas plants relying on physical separation (sand filtration or reverse osmosis) retained fecal-associated taxa and MGEs. Specific clinically relevant ARGs persisted after treatments, including
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