Coinfections in intensive care units. Has anything changed with Covid-19 pandemia?

Federica Romanelli1, Stefania Stolfa2, Luigi Ronga3

  • 1a:1:{s:5:"en_US";s:115:"1Section of Microbiology, Interdisciplinary Department of Medicine, University of Bari "Aldo Moro", Bari, Italy";}. federica.romanelli@policlinico.ba.it.

Insights

This study compared bacterial and fungal co-infections in COVID-19 patients to those in pre-pandemic intensive care unit (ICU) patients. Findings reveal specific pathogens like Acinetobacter baumannii are more prevalent in COVID-19 patients, guiding empirical therapy choices.

Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Critical Care Medicine

Background:

  • The Coronavirus disease 2019 (COVID-19) pandemic has raised concerns about secondary bacterial and fungal infections.
  • These co-infections can significantly increase disease severity and mortality in patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
  • Understanding changes in co-infection patterns is crucial for effective patient management and empirical treatment strategies.

Purpose of the Study:

  • To evaluate the incidence and types of bacterial and fungal co-infections in COVID-19 patients admitted to the ICU.
  • To compare these co-infection rates with those in patients admitted to the ICU during the pre-COVID-19 era.
  • To determine if the pandemic has altered the prevalence of overinfections in ICU settings.

Main Methods:

  • Analysis of clinical specimens (blood cultures, urine, tracheobronchial aspirates) from 1905 patients.
  • Dedicated intensive care units (ICUs) were established for SARS-CoV-2 patients during the pandemic.
  • Comparison of microbial isolate prevalence between COVID-19 patients and non-COVID-19 patients from the pre-COVID-19 era.

Main Results:

  • Statistically significant differences in pathogen prevalence were observed between COVID-19 and non-COVID-19 patients.
  • Specific pathogens like Acinetobacter baumannii complex, Aspergillus fumigatus, Escherichia coli, Haemophilus influenzae, and Serratia marcescens showed differing prevalence in respiratory samples.
  • Candida albicans in urine, and Acinetobacter baumannii complex, Enterococcus faecalis, and Enterococcus faecium in blood cultures were also significantly different.

Conclusions:

  • While isolated organisms are common in healthcare-associated infections, COVID-19 patients showed a particular prevalence of Acinetobacter baumannii, Stenotrophomonas maltophilia, and Aspergillus spp. in the respiratory tract.
  • A significant increase in Candida albicans in urine samples was noted in COVID-19 patients.
  • Bloodstream infections in COVID-19 patients were notably associated with Acinetobacter baumannii, Enterococcus faecalis, and Enterococcus faecium.
Abstract

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