Associations between human bacterial pathogens and ARGs are magnified in leachates as landfill ages

Dong Wu, Liuhong Wang, Yinglong Su, Jan Dolfing, Bing Xie*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Landfills constitute the largest treatment and disposal reservoirs of anthropogenic waste on earth and they are continuously releasing antibiotic resistance genes (ARGs) to the environment for decades via leachates. Little is known about the association between ARGs and human bacterial pathogens as a function of time. Here, we quantified 10 subtypes of ARGs, integrons, and human bacterial pathogens (HBPs). Except for the ARGs encoding resistance to sulfonamides, the subtypes encoding resistance to beta-lactams, macrolides, and aminoglycosides were not related to integrons (Spearman, P > 0.05). Over time presence of ARGs became increasingly more correlated with the presence of human bacterial pathogens (Procrustes test; R = 0.81, P < 0.05), which were primarily identified as the Proteobacteria, Actinobacteria, and Firmicutes. Rather than the prevalence of integrons, dynamics of the bacterial community, including the increased nitrogen metabolism activity of Proteobacteria and decreased bacterial diversity were assumed to lead to a magnified association between HBPs and target ARGs (Varpart; > 13%).

Original languageEnglish
Article number128446
Number of pages9
JournalChemosphere
Volume264
Issue numberPart 1
Early online date2 Oct 2020
DOIs
Publication statusPublished - 1 Feb 2021

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