Antimicrobial resistance of staphylococcus aureus causing of surgical site infections in ear, nose and throat surgery

Introduction: Staphylococcus aureus is one of the major pathogens that causes of surgical site infection (SSI). Scant information is available on the occurrence and antimicrobial susceptibility of S. aureus in patients with SSI in Ear, Nose and Throat (ENT) surgery. The aim: To assess the activity of antimicrobials against S.aureus, isolated from patients with SSI by the ENT departments of Kyiv hospitals. Materials and methods: A total of 516 S. aureus isolates from of patients with SSI in ENT surgery. Antimicrobial susceptibility of S. aureus were determined, using automated microbiology analyzer. Some antimicrobial susceptibility test used Kirby - Bauer antibiotic testing. Interpretative criteria were those suggested by the Clinical and Laboratory Standards Institute (CLSI). Results: The most active antibiotics found in the study were linezolid and tigecycline, showing growth inhibition of 100% strains tested. Susceptibility to the other antimicrobials was also on a high level: 98,4% of strains were found susceptible to nitrofurantoin, 98.1% - to trimethoprim/sulphamethoxazole, 97.6% - to fusidic acid, 97.1% - to mupirocin, 95.9% - to teicoplanin, 94.7% - to vancomycin and fosfomicin, 90.6% - to moxifloxacin, 89.1% - to tobramycin, 87.3% - to gentamycin. Susceptibility to rifampicin (85.5%), cefoxitin (84.6%), levofloxacin (84.3%), erythromycin (82.6%), tetracycline (76.3%), and clindamycin (75.4%) was observed to be some lower. Resistance to oxacyllin S.aureus (MRSA) came up to 21.1%. Conclusions: S. aureus in ENT departments to be a serious therapeutic and epidemiologic problem. The constant monitoring of antimicrobials resistance in every hospital is required. Antibiotics application tactics should be determined in accordance with the local data of resistance to them.