Differences between COVID-19 and non-COVID-19 patients' bloodstream infections: a single-center retrospective study

Çağla Keskin Sarıtaş1, Halit Özsüt2, Aysun Benli2

  • 1Department of Infectious Diseases and Clinical Microbiology, Marmara University Training and Research Hospital, Istanbul, Turkey.

Insights

COVID-19 patients with intensive care unit (ICU)-associated bloodstream infections (BSIs) showed higher rates of multidrug-resistant (MDR) bacteria, linked to prior antibiotic use. These patients experienced shorter survival times post-BSI compared to non-COVID-19 patients.

Area of Science:

  • Infectious Diseases
  • Critical Care Medicine
  • Microbiology

Background:

  • Intensive care unit (ICU)-acquired bloodstream infections (BSIs) pose a significant threat to patient outcomes.
  • Understanding the specific characteristics of BSIs in coronavirus disease 2019 (COVID-19) patients is crucial for effective management.

Purpose of the Study:

  • To compare epidemiological, clinical, microbiological, and outcome data of COVID-19 and non-COVID-19 patients with ICU-acquired BSIs.
  • To identify risk factors associated with mortality in BSI patients.

Main Methods:

  • A retrospective study of 234 patients with ICU-acquired BSIs between March 2020 and April 2022.
  • Patients were categorized into COVID-19 (n=127) and non-COVID-19 (n=107) groups.
  • Descriptive statistics and logistic regression analysis were employed to compare groups and identify mortality risk factors.

Main Results:

  • COVID-19 patients had a higher incidence of respiratory sources for BSIs (43.3% vs. 26%).
  • Acinetobacter baumannii and Gram-negative multidrug-resistant (MDR) bacteria were significantly more prevalent in COVID-19 patients (24.4% vs. 5.6% and 81.7% vs. 61.7%, respectively).
  • Longer prior antibiotic use in COVID-19 patients was associated with MDR Gram-negative bacterial BSIs, and COVID-19 patients had shorter survival times post-BSI.

Conclusions:

  • Multidrug-resistant microorganisms are prevalent in COVID-19 patients with ICU-acquired BSIs.
  • Prior antibiotic use in hospitals contributes to the development of MDR bacterial BSIs in COVID-19 patients.
  • COVID-19 is associated with poorer outcomes in patients with ICU-acquired BSIs.
Abstract

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