EVALUATION OF POSTOPERATIVE WOUND CULTURE RESULTS AT AN ORTHOPEDIC CLINIC: A THREE-YEAR ANALYSIS

Objective: Wound infections constitute the most prevalent postoperative complication encountered by orthopedists. Lack of timely and correcttreatment may lead to chronic wound infections. Therefore, this study aims to guide empirical treatment, investigate the isol ated bacteria andassociated antibiotic resistance states in wound cultures obtained after orthopedic surgery.Methods: In the three-year period between January 2016 and end of December 2018, 3100 patients were operated in the Orthopedics andTraumatology Clinic of the Kirsehir Ahi Evran University Training and Research Hospital. Wound cultures obtained from patients operated due towound infections were retrospectively evaluated. Antibiotic susceptibility tests were performed in accordance with EUCAST guidelines using discdiffusion methods and the VITEK 2 Compact®(Biomerieux, France) automated system.Results: A total of 284 wound culture specimens were evaluated, and 85 (22.9%) of these demonstrated significant bacterial growth. Monomicrobialgrowth was detected in 92% and polymicrobial growth was found in 8% of the cultures. The most commonly isolated microorganism wasEscherichia coli (22.3%), followed by coagulase negative staphylococci (CoNS) (20%), Staphylococcus aureus (15.3%), Acinetobacter baumannii(9.4%), Pseudomonas aeruginosa (9.4%) and Streptococcus spp. (5.8%) respectively. Extended-spectrum beta-lactamase (ESBL) positivity wasdetermined as 100% and 25% for E. coli and K. pneumoniae isolates, respectively. Carbapenems were found to be the most effective antibiotics toEnterobacteriales family. Gram positive bacteria were not resistant against vancomycin and teicoplanin, but 7.6% of S. aureus strains and 57.1% ofCoNS were methicillin-resistant.Conclusion: Identification and monitoring of causative microorganisms in postoperative wound infections and antibiotic resistance rates at everyhospital is quite important. Taking these findings into consideration will result in better prevention of infections, increased treatment success, anddecreased antibiotic resistance rates

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