Abstract
Carbapenem resistance in Acinetobacter baumannii is a growing public health concern and is most often mediated by OXA carbapenemases. We describe a novel multiplex polymerase chain reaction (PCR) assay able to detect and distinguish alleles encoding three subgroups of acquired OXA carbapenemases (OXA-23-like, OXA-24-like and OXA-58-like) that are scattered in Acinetobacter spp., and a fourth subgroup, OXA-51-like, which appears to be intrinsic to Acinetobacter baumannii. Isolates belonging to two prevalent UK A. baumannii 'OXA' clones (OXA-23 clones 1 and 2) had alleles encoding both an intrinsic OXA-51-like and an acquired OXA-23 enzyme, whereas isolates of the 'SE clone' had only an intrinsic blaOXA-51-like allele. Genes encoding OXA-58 were detected (with blaOXA-51-like) in a cluster of related isolates from a single hospital. This simple assay will assist in monitoring the mechanisms responsible for carbapenem resistance in Acinetobacter spp.
Original language | English |
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Pages (from-to) | 351-353 |
Number of pages | 3 |
Journal | International Journal of Antimicrobial Agents |
Volume | 27 |
Issue number | 4 |
DOIs | |
Publication status | Published - Apr 2006 |
Bibliographical note
Funding Information:We are grateful to AstraZeneca for supporting the work of J.M.C. on carbapenem-resistant Acinetobacter. The work of N.W., D.M.L. and M.E.W. on emerging β-lactamases is supported, in part, by the EU/FP6-funded COBRA project (6-PCRD LSHM-CT-2003-503-335). The work of S.B. and S.G.B.A. was supported by the Chief Scientist Office of the Scottish Executive Health Department (grant number CZB/4/42). This work was presented in December 2005 at the 45th ICAAC, Washington, USA; Poster D-1706.
Keywords
- Acinetobacter
- Antibiotic resistance
- Carbapenemases
- Molecular diagnostics
- OXA enzymes