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Fifty-six Acinetobacter species strains (49 Acinetobacter baumanii, 5 Acinetobacter calcoaceticus, 2 Acinetobacter iwoffii) were detected using both conventional methods and gas chromatography of bacterial fatty acids with the MIDI Sherlock® Microbial Identification System. The susceptibilities of these strains to 16 antimicrobial agents were investigated by the disc-diffusion method according to the National Committee for Clinical Laboratory Standards. The production of extended-spectrum β-lactamases (ESBLs) and inducible β-lactamases (IBLs) by the strains were investigated by the double-discsynergy and disc-approximation methods, respectively. Imipenem was the most effective agent for Acinetobacter baumanii strains (95.9% of strains were sensitive), while meropenem and netilmicin showed moderate activity (87.7% and 79.6% of strains, respectively, responded). Acinetobacter baumanii strains were less …