Incidence and etiology of catheter associated urinary tract infection among admitted patients at Kabale Regional Referral Hospital, South Western Uganda

Abstract

Introduction: Catheter Associated Urinary Tract Infection is the most common hospital acquired infection worldwide. Urinary Tract Infections among catheterised patients are on rise regardless of antibiotic use and this is due to erratic use of antibiotics, treatment failure, antimicrobial resistance and em- ergency of Extended Spectrum Beta Lactamase producing bacteria leading to patient distress, increased healthcare costs, long hospital stay and poor patient response to antibiotics. In Uganda, no previous studies have sought to study the burden of CAUTI among catheterized patients, the bacterial pathogens involved and their antimicrobial susceptibility patterns yet there is upsurge in antimicrobial resistance of uropathogens. The effective management of patients suffering from Catheter Associated Urinary Tract infection (CAUTI) relays on the identification of uropathogens that cause CAUTI and the selection of an effective antibiotic agent to the uropathen in question. Objectives: The objectives of this study were to determine incidence, etiology and antibiotic susceptibility pattern among the uropathogens causing Catheter Associated Urinary Tract Infections among patients with indwelling catheters at Kabale Regional Referral Hospital. Methods: Using a descriptive prospective observational hospital-based study, the study was conducted on 150 catheterized patients recruited from Emergency, Obstetrics and gynecology, Medical, Maternity and Surgical wards at Kabale Regional Referral Hospital between April and May 2019. The urine samples from study participants were processed in Kabale RRH microbiology laboratory as per standard operating procedures. After isolation and identification, all the isolates were subjected to antibiotic susceptibility testing for commonly used antibiotics. Results: Following the urine culture from 150 catheterized patients, urine from 23 (15.3%) patients showed significant growth. The common bacterial isolates were Escherichia coli 12 (52%), followed by the Klebsiella pneumoniae 6 (26%), Staphylococcus aureus 3 (13%) and Pseudomonas spp. 2 (8.7%). All Gram-negative isolates were sensitive to Imipenem 20 (100%) while all S. aureus isolates (3) were 100% sensitive to Vancomycin and Cefoxitin. Isolates were sensitive to Gentamicin 20 (82.6), Ceftriaxone 16 (69.6), Ciprofloxacin 10 (43.5) and Nitrofurantoin 9 (39.1). All isolates were 100% resistant to Cotrimoxazole. 6 gram negative isolates were resistant to ceftazidime and were tested for Extended Spectrum Beta (ß) Lactamase (ESBL), 5 (83.3%) were Keywords 1. Introduction identified as ESBL-producing bacteria. K. pneumonia 3 (60%) presented the highest percentage of ESBLs as compared to E. coli 2 (40%). Conclusions: The Incidence of CAUTI among patients with indwelling urinary catheters at Kabale Regional Referral Hospital is high (15.3%) and is mostly caused by E. coli and K. pneumoniae. These bacteria are resistant to most commonly used antibiotics and thus there is a need to put more emphasis on CAUTI prevention strategies and use culture and sensitivity tests before prescription of antibiotics.