OBJECTIVE To explore the effect of dose of cefoperazone/sulbactam on the change of drug resistance of Acinetobacter baumannii and observe its impact on the drug resistance to cefepime,imipenem,levofloxacin,and cefoperazone/sulbactam.METHODS A total of 131,093 cases of patients,who were enrolled for the bacterial culture from 2009 to 2012,were selected as the research objects,the positive specimens were analyzed,then the drug resistance of the isolated A.baumannii to cefoperazone/sulbactam,ampicillin/sulbact...