Use of the FilmArray® Meningitis/Encephalitis panel to detect pathogenic microorganisms in cerebrospinal fluid

Makoto Hara1, Masaki Ishihara1, Hideto Nakajima1

  • 1Division of Neurology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.

Abstract

Insights

The FilmArray® Meningitis/Encephalitis (ME) panel offers rapid pathogen detection for neurological emergencies. This multiplex polymerase chain reaction test significantly reduces diagnostic time compared to conventional methods, enabling quicker treatment initiation.

Area of Science:

  • Neurology
  • Infectious Diseases
  • Molecular Diagnostics

Background:

  • Meningitis and encephalitis are critical neurological emergencies demanding prompt diagnosis and intervention.
  • Current diagnostic approaches often involve lengthy processes, delaying crucial treatment.
  • The FilmArray® Meningitis/Encephalitis (ME) panel represents a rapid multiplex polymerase chain reaction (PCR) diagnostic tool.

Purpose of the Study:

  • To evaluate the performance of the FilmArray® ME panel in diagnosing meningitis and encephalitis.
  • To compare the diagnostic accuracy and speed of the FilmArray® ME panel against conventional diagnostic methods.
  • To assess the potential of the FilmArray® ME panel in reducing time to definitive diagnosis.

Main Methods:

  • A retrospective study involving 20 patients diagnosed with meningitis or encephalitis.
  • Comparison of results obtained from the FilmArray® ME panel with conventional laboratory methods.
  • Analysis of pathogen identification rates and time to results for both methods.

Main Results:

  • The FilmArray® ME panel identified pathogens in 55% of patients, compared to 45% with conventional methods.
  • Specific pathogens detected included herpes simplex viruses (types 1 and 2), varicella-zoster virus, *Streptococcus pneumoniae*, and *Cryptococcus neoformans*.
  • Median time for pathogen identification was significantly reduced to 2 hours with the FilmArray® ME panel versus 96 hours for conventional methods.

Conclusions:

  • The FilmArray® ME panel demonstrates comparable sensitivity to conventional methods for detecting common meningitis and encephalitis pathogens.
  • This multiplex PCR test substantially decreases the time required for pathogen identification.
  • The rapid results from the FilmArray® ME panel can facilitate earlier initiation of definitive treatment for patients.