Objective: To investigate the clinical distribution and drug resistance of lower respiratory nosocomial infections caused by Acinetobacter baumannii.Methods:Sputum specimens were collected from 17 907 inpatients from January 2011 to December 2011 who were treated according to the national clinical laboratory produres(3rd editon).The incidence of positive Acinetobacter baumannii and the rate of resistance to different antibiotics were calculated.Results: Of the total 5372 cases,206 strains of Acinetobacter b...