Transposons containing drug resistance gened in different A. baumannii strains. (A) Blue and green, ISAba1; orange, ISAba1 and ISAba16; yellow, ISAba14 and ISAba16; gray, ISAba20 and ISAba1; rose red, ISAba1 and ISAba13; pink, ISAba1 and ISAba18; purple, ISAba1 and ISAba14; blank areas, the absence of transposons containing drug resistance genes. (B) Structures of transposons containing blaOXA23, Tn2009-like (blue in panel A) and Tn2006 (green in panel A).