bla IMP-4 in Different Genetic Contexts in Enterobacteriaceae Isolates from Australia

Abstract

ABSTRACT The IMP-4 metallo-β-lactamase, originally recognized in Acinetobacter spp. from Hong Kong, more recently appeared simultaneously in isolates of the family Enterobacteriaceae from Sydney and Melbourne, Australia. The bla IMP-4 - qacG2 - aacA4 - catB3 cassette array was found in isolates from both cities, but in different wider genetic contexts and on different plasmids, suggesting movement of this array by homologous recombination.