Quinolone-resistant A. baumannii (QRAB) harbored mutations of gyrA and parC.
QRAB resistance to aminoglycosides and carbapenems held armA and blaOXA-23 genes.
Multidrug resistant A. baumannii carried blaOXA-23, armA, and QRAB mutations.
All these MDRAB belonged to European clone II, most of which belonged to clonal complex 92.
It is the first report of hospital dissemination of MDRAB in western China.