Abstract
A novel VIM-type metallo-β-lactamase variant, VIM-60, was identified in multidrug-resistant Pseudomonas aeruginosa clinical isolates in Japan. Compared with VIM-2, VIM-60 had two amino acid substitutions (Arg228Leu and His252Arg) and higher catalytic activities against fourth-generation cephalosporins. The genetic context for blaVIM-60 was intI1-blaVIM-60-aadA1-aacA31-qacEdeltaI-sulI on the chromosome.
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