Major biologic characteristics of Acinetobacter baumannii isolates from hospital environmental and patients' respiratory tract sources.

Background: This prospective study investigated major biologic characteristics of Acinetobacter baumannii isolates from hospital environment and respiratory tract samples of patients admitted to adult intensive care units (ICUs) at the Jordan University Hospital.

Methods: A baumannii isolates from both sources were examined for antimicrobial susceptibility and for presence of specific metallo-β-lactamase genes (VIM-2, IMP-1) and OXA-type β-lactamase genes (OXA-type) using polymerase chain reaction and biofilm formation and surviving under various temperatures and pH conditions.

Results: The majority of A baumannii isolates from environmental and patients sources was multidrug resistant (MDR), except for colistin and tigecycline.