Abstract
The aim of this study was to investigate the prevalence of carbapenemase and CTX-M genes among 330 blood culture isolates of Enterobacterales with reduced susceptibility to at least 1 carbapenem, between 2010 and 2015. BD Max CRE assay and in-house PCR were used to detect carbapenemase and CTX-M genes. At least 1 carbapenemase gene was detected among 113 (74.3%) of the 152 carbapenem resistant isolates. The OXA-48 (69.7%) was the most common carbapenemase followed by VIM, NDM and IMP, whereas no tested isolates were KPC-positive. Eighty-six isolates (56.6%) had CTX-M and 65 had both OXA-48 and CTX-M. Carbapenemase production in Enterobacterales was significantly increased in years (P < .05). Our study indicates that there is ongoing endemic circulation of the OXA-48 producing organism in our facility. It is noteworthy that more than half of the OXA-48 producing strains also produced CTX-M enzyme.
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