Yatan Hastalarda Çeşitli Klinik Örneklerden İzole Edilen Acinetobacter baumanniii Suşlarının Antibiyotiklere Direnç Durumlarının İncelenmesi

Abstract

Aim: Due to the widespread use of broad spectrum antibiotics in recent years, rapid increases in drug resistance of Acinetobacter baumanni (A. baumannii) have become an urgent problem worldwide. In this study, it was aimed to determine the antimicrobial resistance patterns of A. baumannii strains isolated from clinical samples and to contribute to empirical treatment and antibiotic use policies. Material and Methods: A total of 136 A. baumannii strains isolated from clinical specimens between January 2015 and December 2017 were retrospectively analyzed. The samples were inoculated in 5% sheep blood, EMB (Eosin Methylene Blue) and chocolate agar media, while blood and sterile body fluids were inoculated in Bactec 9120 blood culture system. Bacterial identification and antimicrobial susceptibility testing were performed using conventional methods and Phoenix (Becton Dickinson, USA) fully automated bacteria identification system. Results: A. baumannii strains were most frequently isolated from the intensive care units 109 isolates (80.1%) and from the respiratory tract samples 98 isolates (72%). Antibiotic resistance rates were found to be 5.9% for colistin, 39.7% for amikacin, 73.5% for trimethoprim/sulfamethoxazole, 81.6% for gentamicin, 82.4% for meropenem, 83.1% for imipenem, ciprofloxacin, 83.8% for ceftazidime and 85.3% from cefepime, piperacillin, piperacillin/tazobactam. Conclusion: High rates of resistance to antibiotics other than colistin and amikacin (>70%) suggested that empirical antibiotic treatment should be performed very carefully especially in intensive care unit patients with severe respiratory tract infections.