Complete Sequencing of Plasmids Containing bla OXA-163 and bla OXA-48 in Escherichia coli Sequence Type 131
Stoesser N., Sheppard AE., Peirano G., Sebra R., Lynch T., Anson L., Kasarskis A., Motyl MR., Crook DW., Pitout JD.
ABSTRACT OXA-48-like enzymes have emerged as important extended-spectrum β-lactamases/carbapenemases in Escherichia coli sequence type 131 (ST131). We report the structures of the first fully sequenced bla OXA-163 plasmid and of two other bla OXA-48 plasmids in this lineage. bla OXA-163 was located on a 71-kb IncN plasmid with other resistance genes. bla OXA-48 was present on IncL/M plasmids, genetically similar to other bla OXA-48 plasmid sequences, and consistent with interspecies/interlineage spread. The presence of bla OXA-48-like genes on epidemic plasmids in ST131 is of concern.