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10.05.2018 | Original Paper | Ausgabe 4/2018

Infection 4/2018

Clinical patterns, epidemiology and risk factors of community-acquired urinary tract infection caused by extended-spectrum beta-lactamase producers: a prospective hospital case-control study

Zeitschrift:
Infection > Ausgabe 4/2018
Autoren:
Basima A. Almomani, Wail A. Hayajneh, Abeer M. Ayoub, Mera A. Ababneh, Miral A. Al Momani

Abstract

Purpose

To assess incidence rate, risk factors and susceptibility patterns associated with extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli or Klebsiella pneumoniae in community-acquired urinary tract infections (CA-UTIs).

Methods

A prospective, case-control study was conducted at a tertiary teaching hospital from Jan 2015 to Dec 2016. The results of microbiology cultures were initially screened to include only patients with positive E. coli or K. pneumoniae urine cultures. Afterwards, clinical symptoms were assessed to confirm the UTI. To investigate the risk factors, patients with a positive urine culture for ESBL-producing isolates were assigned as cases, while patients with non-ESBL were assigned as controls.

Results

Out of 591 patients included in this study, 57.5% (n = 340) were included in the control group and 42.5% (n = 251) were in the case group. The incidence rate of ESBL-producing isolates was 3.465 cases per 1000-patient hospital admissions. Male gender (OR = 1.856, 95% CI = 1.192–2.889, p = 0.006), pediatrics (OR = 1.676, 95% CI = 1.117–2.517, p = 0.013), patients with comorbidity (OR = 1.542, 95% CI = 1.029–2.312, p = 0.036) and UTI in the previous 12 months (OR = 1.705, 95% CI = 1.106–2.628, p = 0.016) were independently associated with a higher risk of infection. The resistance rate for most commonly prescribed antibiotics was high.

Conclusions

Our results suggest that the incidence of ESBL producers among CA-UTIs is high. Male gender, pediatrics, comorbidity and UTI in the previous 12 months were associated with a higher risk for infection. Continuous surveillance and prudent antibiotic use by healthcare professionals are important factors for effective control of ESBL associated infections.

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