Carbapenem resistant Acinetobacter baumannii, especially the metallo beta lactamase (MBL) positive ones, are fast coming up the list of pathogens causing nosocomial infections. Thus it should be a present day concern of all tertiary care hospital to detect the presence of MBL positive Acinetobacter baumannii. Aims: To determine the presence and extent of MBL positive Acinetobacter bauman- nii group.