Molecular characterization of beta-lactamase genes and their genetic structures in Acinetobacter genospecies 3
Li-Yueh Huang1, Po-Liang Lu, Te-Li Chen
1Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan.
Abstract:
The genetic structure of beta-lactamases in Acinetobacter genospecies 3 (AG3) isolates in Taiwan was studied to analyze their high rates of resistance to beta-lactams, including carbapenems (57.9%). bla(IMP-1) and bla(IMP-8) were located in a class 1 integron. bla(OXA-58) was bracketed by ISAba3. A novel TnpF-like integrase gene was identified upstream of bla(VEB-3). Adjacent to the 5' sequence of the bla(ADC) gene, folE was identified. Four new Acinetobacter-derived cephalosporinase (ADC) enzymes were found, which clustered phylogenetically with published AG3 ADC proteins.
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