Journal
CLINICAL MICROBIOLOGY AND INFECTION
Volume 17, Issue 8, Pages 1275-1279Publisher
ELSEVIER SCI LTD
DOI: 10.1111/j.1469-0691.2011.03469.x
Keywords
bla(OXA-51)-like; carbapenemase; multilocus sequence typing; pulsed-field gel electrophoresis type; sequence groups
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A recent collection of 213 imipenem-resistant Acinetobacter baumannii (IRAB) clinical isolates was characterized for the presence of acquired carbapenem-hydrolysing class D beta-lactamases (CHDLs) and clonality. A population structure analysis of IRAB was also conducted, with five molecular typing methods. Three main clusters, each one associated with a specific CHDL, were observed with multilocus sequence typing. Overall, our results suggest a switch in the dominant clone, with sequence type (ST) 92, carrying bla(OXA-23) (63.4%), replacing the closely related ST98, carrying bla(OXA-24/40) (22%). In addition, ST103, an independent lineage, was associated with bla(OXA-58)-carrying isolates (14.6%).
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