extreme antibiotic resistant acinetobacter baumannii-related pneumonia in a regional hospital

most nosocomial infections have been attributed to nonfermenters, particularly acinetobacter baumannii which causes serious infections like pneumonia, meningitis, and sepsis. the purpose of this study was to report our experience with five cases of a. baumannii-related pneumonia infections, seen in a regional hospital, karaj, iran. five cases were identified as having a. baumannii- related pneumonia infection.  all cases had been treated previously with various antibiotics at time of diagnosis. the treatment of a. baumannii- related pneumonia infection in all the cases varied. but unfortunately, all the five cases died from severe a. baumannii- related pneumonia and severe sepsis. our cases brought forth the burden of a. baumannii-related pneumonia infections associated with significant mortality. physicians should be aware of the remarkable virulence and antibiotic resistance.