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• W4378469674 abstract "Abstract CTX-Ms are encoded by bla CTX-M genes and are widely distributed extended-spectrum β-lactamases (ESBLs). They are the most important antimicrobial resistance (AMR) mechanism to β-lactam antibiotics in the Enterobacteriaceae. However, the role of transmissible AMR plasmids in the dissemination of bla CTX-M genes has scarcely been studied in Africa where the burden of AMR is high and rapidly spreading. In this study, AMR plasmid transmissibility, replicon types and addiction systems were analysed in CTX-M-producing Escherichia coli clinical isolates in Ethiopia with a goal to provide molecular insight into mechanisms underlying such high prevalence and rapid dissemination. Of 100 CTX-Ms-producing isolates obtained from urine (84), pus (10) and blood (6) from four geographically distinct healthcare settings, 75% carried transmissible plasmids encoding for CTX-Ms, with CTX-M-15 being predominant (n = 51). Single IncF plasmids with the combination of F-FIA-FIB (n = 17) carried the bulk of bla CTX-M-15 genes. In addition, IncF plasmids were associated with multiple addiction systems, IS Ecp 1 and various resistance phenotypes for non-cephalosporin antibiotics. Moreover, IncF plasmid carriage is associated with the international pandemic E. coli ST131 lineage. Furthermore, several CTX-M encoding plasmids were associated with serum survival of the strains, but less so with biofilm formation. Hence, both horizontal gene transfer and clonal expansion may contribute to the rapid and widespread distribution of bla CTX-M genes among E. coli populations in Ethiopian clinical settings. This information is relevant for local epidemiology and surveillance, but also for global understanding of the successful dissemination of AMR gene carrying plasmids." @default.
• W4378469674 created "2023-05-27" @default.
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• W4378469674 date "2023-05-26" @default.
• W4378469674 modified "2023-10-02" @default.
• W4378469674 title "Characterization of plasmids carrying blaCTX-M genes among extra-intestinal Escherichia coli clinical isolates in Ethiopia" @default.
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• W4378469674 doi "https://doi.org/10.1038/s41598-023-35402-2" @default.
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