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Genomic dissection of endemic carbapenem resistance reveals metallo-beta-lactamase dissemination through clonal, plasmid and integron transfer. | LitMetric

AI Article Synopsis

Article Abstract

Infections caused by metallo-beta-lactamase-producing organisms (MBLs) are a global health threat. Our understanding of transmission dynamics and how MBLs establish endemicity remains limited. We analysed two decades of bla evolution in a hospital using sequence data from 270 clinical and environmental isolates (including 169 completed genomes) and identified the bla gene across 7 Gram-negative genera, 68 bacterial strains and 7 distinct plasmid types. We showed how an initial multi-species outbreak of conserved IncC plasmids (95 genomes across 37 strains) allowed endemicity to be established through the ability of bla to disseminate in successful strain-genetic setting pairs we termed propagators, in particular Serratia marcescens and Enterobacter hormaechei. From this reservoir, bla persisted through diversification of genetic settings that resulted from transfer of bla plasmids between bacterial hosts and of the integron carrying bla between plasmids. Our findings provide a framework for understanding endemicity and spread of MBLs and may have broader applicability to other carbapenemase-producing organisms.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10409761PMC
http://dx.doi.org/10.1038/s41467-023-39915-2DOI Listing

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