[ Pharmaceutical Sciences Asia - ONLINE ]
Print ISSN 2586-8195 E-ISSN 2586-8470
[ Journal Abbreviation: Pharm.Sci.Asia ]
Mahidol University Journal of Pharmaceutical Sciences
  FORMER NAME   "Mahidol University Journal of Pharmaceutical Sciences" Published Since 1974


DOI: 10.29090/psa.2020.04.020.0100Pharm Sci Asia 2020; 47(4), 319-328

Detection of carbapenemases-producing Acinetobacter baumannii: the phenotypic approaches

Krit Thirapanmethee*

- Department of Microbiology, Faculty of Pharmacy, Mahidol University, 447 Sri-Ayuthaya Road, Rajathevi, Bangkok 10400, Thailand

Antimicrobial resistance among Acinetobacter species represents one of the most critical challenges within healthcare settings. Acinetobacter baumannii primarily causes hospital-acquired infections affecting patients with prolonged hospitalization and with long-term administration of antimicrobials. A. baumannii can develop antimicrobial resistance, especially to carbapenems, the last-line of antimicrobial agents to treat serious infections. Several resistance mechanisms have been reported including antimicrobial-degrading enzymes, efflux pumps, target modification and porin deficiency which likely work synergistically. Among those, the most prevalent mechanism is enzymatic degradation by carbapenemases, β-lactamase enzymes that are capable to hydrolyse carbapenems. Currently, spreading of carbapenem-resistant A. baumannii has been increasing worldwide. A high prevalence of A. baumannii with multidrug-resistance including carbapenems leads to conventional failure of common antibiotic therapy treatments. Therefore, accurate and rapid detection techniques of carbapenemases-producing A. baumannii are extensively required to screen and prevent the outbreak of this microorganism. Both phenotypic and genotypic methods have been developed aiming to detect carbapenemases enzymes. This review summarizes the concepts and practical approaches for phenotypic detection of this enzyme which are applicable to practise in developing countries.


Acinetobacter baumannii; Carbapenemases; Phenotypic detection; Antimicrobial resistance

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