Ceftazidime-avibactam activity against Escherichia coli and Klebsiella pneumoniae
Abstract
Background and Objectives: Carbapenem-resistant Enterobacteriaceae (CRE) infections are extremely difficult to treat and have a high fatality rate. The study's primary goal was to determine the rate of ceftazidime-avibactam susceptibility using disc diffusion and E-Test, as well as to evaluate the agreement between the two methods.
Materials and Methods: A total of 124 multidrug-resistant (including carbapenem) Escherichia coli and Klebisella pneumoniae isolates were included. Kirby Bauer's disc diffusion and E-test were used as the testing methods in this study.
Results: In this study 37.5% and 33.9% of the isolates were susceptible to ceftazidime-avibactam by E test and Disc diffusion respectively. There were five isolates which produced discordant results. Among the 56 isolates there was 91% agreement between the two methods.
Conclusion: Among the discordant isolates the alarming disparity in zone size was a significant concern. Since CRE infections are very common, an economical and practical method for testing ceftazidime-avibactam susceptibility is needed in all the clinical microbiology laboratories as it is a last resort drug.
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Issue | Vol 17 No 1 (2025) | |
Section | Original Article(s) | |
DOI | https://doi.org/10.18502/ijm.v17i1.17797 | |
Keywords | ||
Infection; Resistance; Susceptibility; Enterobacteriaceae; Carbapenem |
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