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• W3128864263 abstract "The increasing prevalence of extended spectrum β-lactamases (ESBLs) and plasmid-mediated AmpC (pAmpC) β-lactamases among Enterobacterales threatens our ability to treat urinary tract infections (UTIs). These organisms are resistant to most β-lactam antibiotics and are frequently multidrug-resistant (MDR). Consequently, they are often resistant to antibiotics used to empirically treat UTIs. The lack of rapid diagnostic and antibiotic susceptibility tests (AST) makes clinical management of UTIs caused by such organisms difficult, as standard culture and susceptibility assays require several days. We have adapted a biochemical detection assay, termed dual-enzyme trigger-enabled cascade technology (DETECT) for rapid detection of resistance (time-to-result of 3 h) to other antibiotics commonly used in treatment of UTIs. DETECT is activated by the presence of CTX-M and pAmpC β-lactamases. In this proof-of-concept study, the adapted DETECT assay (AST-DETECT) has been performed on pure-cultures of Klebsiella pneumoniae and Escherichia coli (48 isolates) expressing ESBL or pAmpC β-lactamases to perform AST for ciprofloxacin (sensitivity 96.9%, specificity 100%, accuracy 97.9%) nitrofurantoin (sensitivity 95.7%, specificity 91.7%, accuracy 94%) and trimethoprim/sulfamethoxazole (sensitivity 83.3%, specificity 100%, accuracy 89.4%). These results suggest that AST-DETECT may be adapted as a potential diagnostic platform to rapidly detect multidrug-resistant E. coli and K. pneumoniae that cause UTI." @default.
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• W3128864263 date "2021-03-01" @default.
• W3128864263 modified "2023-10-01" @default.
• W3128864263 title "A rapid, antibiotic susceptibility test for multidrug-resistant, Gram-negative bacterial uropathogens using the biochemical assay, DETECT" @default.
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• W3128864263 doi "https://doi.org/10.1016/j.mimet.2021.106160" @default.
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