Low Detection Rate of Bordetella pertussis Using the BioFire FilmArray Respiratory Panel 2plus

Sophie Guillot1,2, Assaf Mizrahi3,4, Nathalie Armatys1,2

  • 1Biodiversity and Epidemiology of Bacterial Pathogens, Institut Pasteur, Paris, France.

Insights

The FilmArray Respiratory Panel 2plus (RP2+) assay has limited detection of Bordetella pertussis, particularly in non-highly charged samples. Negative results do not rule out pertussis infection.

Area of Science:

  • Clinical microbiology
  • Infectious disease diagnostics
  • Respiratory pathogen detection

Background:

  • Syndromic respiratory panels are widely adopted for diagnosing respiratory infections.
  • Accurate detection of Bordetella pertussis is crucial for managing whooping cough outbreaks.
  • The performance of specific assays, like the FilmArray RP2+, requires thorough evaluation.

Purpose of the Study:

  • To evaluate the diagnostic performance of the FilmArray Respiratory Panel 2plus (RP2+) assay for detecting Bordetella pertussis.
  • To determine the limitations of the RP2+ assay in identifying B. pertussis in clinical specimens.

Main Methods:

  • Evaluation of the FilmArray Respiratory Panel 2plus (RP2+) assay.
  • Focus on the detection target for Bordetella pertussis (pertussis toxin promoter).
  • Assessment of assay performance across different sample types or charge characteristics.

Main Results:

  • The FilmArray RP2+ assay demonstrated limited sensitivity for Bordetella pertussis detection.
  • The assay was primarily effective only with highly charged clinical samples.
  • Negative RP2+ results may lead to underdiagnosis of B. pertussis.

Conclusions:

  • The FilmArray RP2+ assay's ability to detect Bordetella pertussis is constrained.
  • Clinicians should exercise caution when interpreting negative RP2+ results for B. pertussis.
  • Alternative or confirmatory testing may be necessary for suspected pertussis cases.

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