MinION Nanopore sequencing enables correlation between resistome phenotype and genotype of coliform bacteria in municipal sewage

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Abstract

Wastewater treatment plants functioned as the intersection between the human society and nature environment, are receiving increasingly more attention on risk assessment of the acquisition of environmental antibiotic resistance genes (ARGs) by pathogenetic populations during treatment. However, because of the general lack of robust resistome profiling methods, genotype and resistance phenotype is still poorly correlated in human pathogens of sewage samples. Here we applied MinION sequencing to quantify the resistance genes of multiple antibiotic resistant (MAR) coliform bacteria, a common indicator for human enteric pathogens in sewage samples. Our pipeline could deliver the results within 30 hours from sample collection and the resistome quantification was consistent to that based on the Illumina platform. Additionally, the long nanopore reads not only enabled a simultaneous identification of the carrier populations of ARGs detected, but also facilitated the genome reconstruction of a representative MAR strain, from which we identified an instance of chromosomal integration of environmental resistance gene obtained by plasmid exchange with a porcine pathogen. This study demonstrated the utilization of MinION sequencing in quick monitoring and simultaneous phylogenetic tracking of environmental ARGs to address potential health risk associated with them.

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Xia, Y., Li, A. D., Deng, Y., Jiang, X. T., Li, L. G., & Zhang, T. (2017). MinION Nanopore sequencing enables correlation between resistome phenotype and genotype of coliform bacteria in municipal sewage. Frontiers in Microbiology, 8(OCT). https://doi.org/10.3389/fmicb.2017.02105

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