Evaluating Blood Culture Parameters to Identify Patients at Low Risk of Infective Endocarditis Among Those With Bacteremia by Gram-positive Cocci - Summary - MDSpire

Evaluating Blood Culture Parameters to Identify Patients at Low Risk of Infective Endocarditis Among Those With Bacteremia by Gram-positive Cocci

  • By

  • Nicolas Fourré

  • Virgile Zimmermann

  • Nicoleta Ianculescu

  • Thomas Brahier

  • Zélie Dennebouy

  • André Teixeira-Antunes

  • Pierre Monney

  • Georgios Tzimas

  • Laurence Senn

  • Lars Niclauss

  • Matthias Kirsch

  • Benoit Guery

  • Matthaios Papadimitriou-Olivgeris

  • August 22, 2025

  • 0 min

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Objective:

To assess the diagnostic performance of blood culture parameters in identifying patients at low risk for infective endocarditis (IE) among those with bacteremia caused by Gram-positive cocci, thereby optimizing cardiac imaging use.

Key Findings:
  • Among 2165 episodes of bacteremia, 561 (26%) were diagnosed with IE, indicating a significant prevalence.
  • Having only 1 positive out of 4 initial blood culture bottles was associated with a negative likelihood ratio (NLR) of 0.10, suggesting a strong predictive value.
  • Combining 1 positive out of 4 blood culture bottles and bacteremia clearance within 48 hours resulted in an NLR of 0.08, reinforcing the utility of these parameters.
Interpretation:

Simple blood culture parameters may help identify low-risk patients for IE, but most patients are classified as high-risk, limiting the reduction of echocardiography use and necessitating further validation.

Limitations:
  • The approach may classify a majority of patients as high-risk, potentially leading to unnecessary procedures.
  • Limited impact on reducing unnecessary echocardiography, highlighting the need for improved risk stratification.
Conclusion:

Blood culture metrics can aid in identifying low-risk patients for IE, but their clinical utility may be constrained by high-risk classifications, warranting further research.

Original Source(s)

Evaluating Blood Culture Parameters to Identify Patients at Low Risk of Infective Endocarditis Among Those With Bacteremia by Gram-positive Cocci

  • by Nicolas Fourré, Virgile Zimmermann, Nicoleta Ianculescu, Thomas Brahier, Zélie Dennebouy, André Teixeira-Antunes, Pierre Monney, Georgios Tzimas, Laurence Senn, Lars Niclauss, Matthias Kirsch, Benoit Guery, Matthaios Papadimitriou-Olivgeris

  • August 22, 2025

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