Emergence of Carbapenem-Resistant Non-baumannii Species of Acinetobacter Harboring a bla OXA-51 -Like Gene That Is Intrinsic to A. baumannii

Abstract

The bla_OXA-51-like gene, originally intrinsic to Acinetobacter baumannii, had been detected in two clones of Acinetobacter nosocomialis and one clone of Acinetobacter genomic species “Close to 13TU.” These bla_OXA-51-like genes, all preceded by ISAba1, were located on plasmids that might have originated with A. baumannii. The plasmid-borne ISAba1--bla_OXA-51-like confers a high level of carbapenem resistance and affects the accuracy of using bla_OXA-51-like detection as a tool for differentiating A. baumannii from other Acinetobacter species.