1, clinical isolate of A. baumannii containing blaOXA-23-like and blaOXA-24-like genes; 2, clinical isolate of A. baumannii having blaOXA-58-like gene; 3,4, clinical isolates of A. baumannii having blaOXA-23-like genes; 5, clinical isolate of A. baumannii with blaOXA-24-like gene; C-, negative control; C+, positive control (A. baumannii NCTC 13304, NCTC 13302, NCTC 13305 for blaOXA-23-like, blaOXA-24-like, blaOXA-58-like ); M, 100 bp DNA ladder.