Objective: Acinetobacter baumannii is an important opportunistic pathogen that can cause severe septicemia and mortality. This study aims to investigate the antibiotic resistance profiles of patients isolated from A. baumannii in the intensive care unit (ICU) and the factors affecting mortality.Materials and Methods: Patients who were followed up in a tertiary ICU between January 2020 and January 2023 and who were found to have A. baumannii in various clinical samples were included in the study. The patients were divided into the mortality group (Group M) and the survival group (Group S). Their clinical features, antibiotic resistance profiles, and mortality factors were analyzed.Results: A total of 228 patients, 110 (48.2%) in Group M and 118 (51.8%) in Group S, were included in the study. The median age of the entire population was 67.5 (18-96), and 60.1% were male. A. baumannii strains were most commonly (59.2%) isolated from tracheal aspirate and sputum cultures. Resistance to carbapenems was 94.2-96.8%, aminoglycosides 88.5-99.2%, tigecycline 54.6%, and colistin 8.1%. Group M had significantly higher Acute Physiology and Chronic Health Evaluation-2 (APACHE-2) scores, mechanical ventilation requirements, and multidrug-resistant A. baumannii count. Independent risk factors for mortality were determined by APACHE-2 scores and mechanical ventilator application at the time of admission to the ICU.
Conclusion:We think that in A. baumannii infections, which are highly resistant to many antibiotics and have high mortality rates, determining the risk factors indicating mortality and antibiotic resistance profiles and making treatment plans will contribute to the prognosis of the patients.