Genetic environments of blaOXA-181 in the K. pneumoniae chromosome, IncT plasmid, Tn2013 (pKP3-A plasmid), IncX3 plasmid, and IncN1 plasmid. Tn6361 with blaNDM-1 in the IncN1 plasmid pNDM-BTR was also shown for comparison with Tn6360 in the IncN1 plasmid pMR3-OXA181. Mobile elements are indicated with black (ISEcp1) or gray (others). Genes from background plasmids are indicated with cyan, and those from the chromosome are indicated with green. Yellow triangles indicate target site duplications.