Abstract
Aim: The study determines rates of carbapenem resistance (CR) and frequency of blaNDM in multidrug-resistance (MDR) or extensivedrug resistance (XDR), and evaluates the potential of phenotypic tests for detecting NDMproduction. Materials & methods: Singleplex PCR was used to detect blaNDM. Phenotypic tests, including combination disc test (CDST) and modified Hodge test (MHT), were evaluated for NDM production. Results: Among 338 CR isolates, 47.63% were MDR, whereas 52.36% were XDR with 53.25% carrying blaNDM. MHT was found to bediscriminativefor detecting NDM production, whereas no significant association was observed for CDST. Conclusion: The high incidence of CR and MDR and XDR isolates possessing blaNDM presents an impending threat in therapeutics. Limitations of phenotypic tests suggest better testing, including molecular detection of the enzyme.
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