Carbapenem resistance rates in Gram-negative bacteria in nosocomial infections: A retrospective study from a tertiary hospital

Abstract

Aim: Just like the rest of the world, the frequency of nosocomial infections is increasing in our country. The aim of this study is to evaluate the change in carbapenem resistance rates of Gram-negative bacteria isolated from health care related infections over the years.Materials and Methods: The study was performed retrospectively between January 2014 and December 2017. Obtained from clinics with hospital surveillance; according to criteria for the diagnosis of nosocomial infections set by the Centers for Disease Control and Prevention (CDC); Gram-negative factors were examined in patients. Acinetobacter baumannii, Pseudomonas aeruginosa, Klebsiella pneumoniae and Escherichia coli strains were evaluated.Results: Carbapenem resistance of A. baumannii strains was 90.7% in 2014 and was 95.9% in 2017. Among the E. coli strains, the rate of carbapenem resistance of 4.1% in 2014, was 7.5% in 2017. While the resistance rate among K. pneumoniae strains was 32.2% in 2014, this rate increased to 48.9% in 2017. Among the P. aeruginosa species, the carbapenem resistance rate was 26.3% in 2014, increased to 38.4% in 2017.Conclusion: In the study, we determined that carbapenem resistance was very high in Acinetobacter spp strains while the resistance rate for Klebsiella spp strains has increased dramatically over the years. Knowing the data will be a guide for the clinicians in selecting empirical antibiotic agents, especially in critical intensive care unit patients, and will guide the development of infection control programs and antibiotic control programs in order to reduce the rate of resistance.