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Open Access 01-12-2018 | Research

Influence of pathogen and focus of infection on procalcitonin values in sepsis patients with bacteremia or candidemia

Authors: Daniel O. Thomas-Rüddel, Bernhard Poidinger, Matthias Kott, Manfred Weiss, Konrad Reinhart, Frank Bloos, for the MEDUSA study group

Published in: Critical Care | Issue 1/2018

Abstract

Background

This study aimed to evaluate the accuracy of procalcitonin (PCT) serum concentrations to diagnose Gram-negative bacteremia and the association of PCT serum concentrations with more specific pathogens and the focus of infection.

Methods

Secondary analysis of the prospectively collected patient-level dataset from a cluster randomized quality improvement trial was performed. The trial included sepsis patients with organ dysfunction treated in the participating intensive care units from 2011 to 2015. Test performance for the prediction of Gram-negative bacteremia was assessed by receiver operating curve analysis. Independent effects of specific pathogen groups and foci of infection on PCT concentrations were assessed by linear logistic regression models.

Results

Blood cultures (BC) and PCT concentrations had been taken in 4858 of 6561 documented patients. PCT was significantly higher in Gram-negative bacteremia compared to Gram-positive bacteremia or candidemia (p < 0.001). The area under the curve was 0.72 (95% confidence interval 0.71–0.74) for the prediction of Gram-negative bacteremia compared to all other blood culture results including negative blood cultures. The optimized cutoff value was 10 ng/ml (sensitivity 69%, specificity 35%). PCT differed significantly between specific groups of pathogens (p < 0.001) with highest concentrations in Escherichia coli, Streptococcus species and other Enterobacteriaceae. PCT was highest in urogenital followed by abdominal infection and lowest in respiratory infection (p < 0.001). In a linear regression model, Streptococci, E. coli and other Enterobacteriaceae detected from BC were associated with three times higher PCT values. Urogenital or abdominal foci of infection were associated with twofold increased PCT values independent of the pathogen.

Conclusions

Serum PCT concentrations are higher in patients with Gram-negative bacteremia than in patients with Gram-positive bacteremia or candidemia. However, the discriminatory power of this difference is too low to guide therapeutic decisions. Variations in PCT serum concentrations are not determined solely by Gram-negative or Gram-positive bacteria but are also affected by distinct groups of pathogens and different foci of infection.

Trial registration

ClinicalTrials.gov, NCT01187134. Registered on 23 August 2010.

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Title: Influence of pathogen and focus of infection on procalcitonin values in sepsis patients with bacteremia or candidemia
Authors: Daniel O. Thomas-Rüddel
Bernhard Poidinger
Matthias Kott
Manfred Weiss
Konrad Reinhart
Frank Bloos
for the MEDUSA study group
Publication date: 01-12-2018
Publisher: BioMed Central
Published in: Critical Care / Issue 1/2018
Electronic ISSN: 1364-8535
DOI: https://doi.org/10.1186/s13054-018-2050-9

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Influence of pathogen and focus of infection on procalcitonin values in sepsis patients with bacteremia or candidemia

Abstract

Background

Methods

Results

Conclusions

Trial registration

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

Trial registration

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