Multiplex PCR for genes encoding prevalent OXA carbapenemases in Acinetobacter spp.

Neil Woodford*, Matthew Ellington, Juliana M. Coelho, Jane Turton, M. Elaina Ward, Susan Brown, Sebastian G.B. Amyes, David M. Livermore

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

943 Citations (Scopus)

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 languageEnglish
Pages (from-to)351-353
Number of pages3
JournalInternational Journal of Antimicrobial Agents
Volume27
Issue number4
DOIs
Publication statusPublished - 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

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