Multidrug-Resistant Microorganisms Associated with Urinary Tract Infections Following Orthopaedic Patients: A Laboratory-Based Analysis of 5239 Patients

Abstract

Background: The risk of healthcare associated infections (HAI) in surgical wards remains closely related to the type of surgery and procedures performed on patients. They also condition the risk of various, apart from the most common, surgical site infections, forms of clinical infections, especially urinary tract infections (UTIs). Their occurrence in orthopedic patients is most often – in about 70%-80%, associated with the use of the bladder catheter in the perioperative period. The aim of this study was the epidemiological and microbiological analysis of UTIs following orthopedic patients, especially MDR in 2013-2015.Methods: The study was conducted in 38-bed Department of Orthopedic-Traumatic Surgery in Sosnowiec, Poland. 5 239 patients surgery included in the study, the urinary catheter utilization rate was 30.7 %. Laboratory based study using the UTI definition of the HAI-Net program, MDR was defined as resistant to at least one antibiotic from 2< antibiotics groups. The results were analyzed using the statistical package PQStat ver. 1.6.0.428 using the chi-square test (chi ^ 2) or Fisher's exact test.Results The UTI incidence was 3.2% (168 cases), CA-UTI incidence density was 9.6/1 000 catheter-days. The highest risk of UTI was found in patients aged 75 years and older. Gram-negative flora prevailed among microorganisms: 76.1%. Predominantly isolated Enterobacterales were: Escherichia coli, Klebsiella pneumoniae. Isolated microorganisms were fully sensitive to carbapenems. Gram-negative bacilli showed the lowest sensitivity to extended substrate spectrum penicillins and fluoroquinolones: 37-64%, trimethoprim-sulfamethoxazole: 50%; MDR prevalence: 24.4%.Conclusions The presented data indicate that UTI incidence is a significant problem in studied population, as well as antimicrobialresistance, especially to quinolones and extended spectrum cephalosporins, as first-line therapy remains a major challenge. To reduce the problem of high UTI incidence and MDR prevalence, the priority should be the reduction of UTI risk – which exceeded the expected values.