Prevalence and Mechanisms of Carbapenem Resistance in Klebsiella pneumoniae and Escherichia coli: A Systematic Review and Meta-Analysis of Cross-Sectional Studies from Iran.

Introduction: Carbapenem-resistant Enterobacteriaceae (CRE) represents an urgent threat worldwide. We aimed to investigate the frequency of carbapenem-resistant Klebsiella pneumoniae and Escherichia coli in Iran. Materials and Methods: PubMed/Medline, Embase, Scopus, Web of Sciences, and Iranian databases were searched to find potentially relevant articles. Statistical analyses were performed using STATA version 14. Results: Forty-nine studies fulfilled the inclusion criteria. The pooled rates of resistance to carbapenem in K. pneumoniae and E. coli were 24.0% (95% confidence interval [CI] 18.0-31.0) and 5.0% (95% CI 2.0-8.0), respectively. blaOXA-48 gene was the most common cause of carbapenem resistance in K. pneumoniae and E. coli. Conclusions: CRE is prevalent in Iran, which confers the importance of strength prevention and control measures.