Objective. To investigate and evaluate possible different resistance to antibiotics and patients' clinical characteristics and risk factors depending on Acinetobacter species: Acinetobacter baumannii or Acinetobacter calcoaceticus.
Material and methods. A retrospective data analysis of resistance to antibiotics and clinical characteristics were made on patients treated in LSMU Kaunas Clinics to whom Acinetobacter spp. was identified from lower respiratory tract, wounds, urine, sterile body fluids (blood, cerebrospinal fluid, pleura) or catheters.
Results. There was no significant difference of resistance to antibiotics between A. baumannii and A. calcoaceticus. A. baumannii and A. calcoaceticus were mostly resistant to ceftazidime, gentamicin and ciprofloxacin. Studied strains were resistant to cefepime most rarely but one third of the microorganisms had only moderate sensitivity to this antibiotic. Although there was a tendency that patients who were indentified with A. calcoaceticus were treated longer in hospital, intensive care unit and mechanical ventilation was prolonged for them comparing to patients who were indentified with A. baumannii, but we were not able to find significant difierence.
Conclusion. Acinetobacter calcoaceticus is a potential cause of hospital infections and has quite the same value as Acinetobacter baumannii. Both studied strains are characterized with big resistance to antibiotics and are the cause of hospital acquired infection in intensive care unit.
