Distribution of beta-lactamases in Acinetobacter baumannii clinical isolates and the effect of Syn 2190 (AmpC inhibitor) on the MICs of different beta-lactam antibiotics
Open Access
- 1 August 2002
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Antimicrobial Chemotherapy
- Vol. 50 (2) , 261-264
- https://doi.org/10.1093/jac/dkf092
Abstract
The distribution of β-lactamases in a group of 20 epidemiologically well defined Acinetobacter baumannii clinical isolates and the in vitro activity of Syn 2190, a novel β-lactamase AmpC inhibitor, were determined. Twenty-five per cent of the strains carried and expressed a TEM-type β-lactamase, whereas 35% had an OXA-type β-lactamase. In nine out of 11 (82%) ceftazidime-resistant and four out of 13 (30.7%) cefepime-resistant strains, the MIC of these β-lactam antibiotics decreased when determined in the presence of Syn 2190. Thus, our results suggest that in a high percentage of A. baumannii clinical isolates the increased production of AmpC, in combination or not with other resistance mechanisms, contributes to the resistance pattern in A. baumannii to β-lactams.Keywords
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