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Introducing a New Polymerase Chain Reaction Panel-Based Cerebrospinal Fluid Evaluation for Encephalitis and

Fabian Sidler1, Pascal Bittel2, Jonas Marschall3,4

  • 1Department of Visceral Surgery and Medicine, Inselspital Bern University Hospital, University of Bern, Bern, Switzerland.

Open Forum Infectious Diseases
|May 5, 2025
PubMed

Insights

The new meningitis/encephalitis polymerase chain reaction panel did not shorten antibiotic treatment or hospital stays. This diagnostic tool did not increase pathogen-specific diagnoses for common causes like Streptococcus or Listeria.

Area of Science:

  • Infectious Disease
  • Clinical Diagnostics
  • Microbiology

Background:

  • Meningitis and encephalitis are serious infections requiring prompt diagnosis and treatment.
  • Empiric antibiotic therapy is often initiated before a definitive pathogen is identified.
  • Novel diagnostic panels aim to improve the speed and accuracy of pathogen detection.

Purpose of the Study:

  • To evaluate the clinical impact of a diagnostic meningitis/encephalitis polymerase chain reaction (PCR) panel.
  • To assess whether the PCR panel shortened empiric antibiotic treatment duration.
  • To determine if the panel affected hospitalization length or increased pathogen-specific diagnoses.

Main Methods:

  • Retrospective analysis of patient data before and after the introduction of the meningitis/encephalitis PCR panel.
  • Comparison of empiric antibiotic treatment duration for Streptococcus and Neisseria meningitidis.
  • Evaluation of hospitalization duration and rates of pathogen-specific diagnoses.

Main Results:

  • Introduction of the PCR panel did not significantly shorten empiric antibiotic treatment duration for streptococcal/meningococcal infections (-1 day; P = .16).
  • Hospitalization duration also showed no significant change (-2 days; P = .86).
  • Empiric treatment durations for Herpesviridae and Listeria monocytogenes remained unchanged, and pathogen-specific diagnoses did not increase.

Conclusions:

  • The diagnostic meningitis/encephalitis PCR panel did not demonstrate a significant impact on reducing empiric antibiotic use or hospitalization length in this analysis.
  • The panel did not lead to an increase in specific pathogen identification compared to previous diagnostic approaches.
  • Further studies may be needed to explore the utility and optimal implementation of such panels in clinical practice.
Keywords:
CNS infectionsPCR paneldiagnostic stewardshipencephalitismeningitis

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