Prevalence of carbapenem resistance genes in Acinetobacter baumannii isolated from clinical specimens obtained from an academic hospital in South Africa

Kock, M. M.; Bellomo, A. N.; Storm, N.; Ehlers, M. M.
March 2013
Southern African Journal of Epidemiology & Infection;2013, Vol. 28 Issue 1, p28
Academic Journal
Acinetobacter baumannii is an important cause of hospital-acquired infections. The occurrence of carbapenem resistance that is caused by the carbapenem-hydrolysing class D β-lactamases and the metallo-ß-lactamases (MBLs) limits the range of therapeutic alternatives in treating A. baumannii infections. In this study, two multiplex polymerase chain reactions were performed to screen for both carbapenem-hydrolysing class D β-lactamases and MBL genes in 97 clinical isolates of A. baumannii. Oxacillinase (OXA)-51 had a prevalence of 83% (81/97), and OXA-23 had a prevalence of 59% (57/97). One isolate was positive for an MBL [Verona integron-encoded metallo ß-lactamases (VIM)]. Therefore, continuous surveillance and monitoring of A. baumannii is crucial because of the high prevalence of antibiotic resistance genes.


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