Abstract:Abstract: Objective:To investigate the distribution of the mobile genetic elements, including integrons, transposons, insertion sequences and conjugative plasmids, in Acinetobacter baumannii carried with blaADC gene. Methods: One hundred and seventy-nine isolates of Acinetobacter baumannii were collected, and their blaADC gene was determined by PCR. Then, four kinds of mobile genetic elements, including integron genetic marks such as intI 1, intI 2, intI 3 and qacE△1-sul1, transposon genetic marks such as merA, tnpU, tnp513 and tnpA, insertion sequence genetic marks such as ISAba1 and IS26, and conjunction plasmid genetic marks such as traA and trbC, and the antimicrobial susceptibility of the isolates with blaADC gene were detected by PCR and the disk diffusion method, respectively. Results:There was 117 isolates of Acinetobacter baumannii carried with blaADC gene in all 179 isolates. Among them, the positive rates of intI 1, qacE△1-sul1, merA, tnpU, tnp513, ISAba1 and IS26 were 71.8%, 98.3%, 94.9%, 93.2%, 76.9%, 98.3% and 100.0%, respectively, and the other 5 genes were negative. There were at least 3 and at most 7 mobile genetic marks to be detected for each of 117 isolates, and the isolates with 3 and 7 mobile genetic marks accounted for 0.9% and 50.4%, respectively. Conclusion:Mobile genetic elements can be easily detected from the Acinetobacter baumannii carried with blaADC, and its drug resistance may be related to the existence of mobile genetic elements.