Multiplex real-time PCR FilmArray performance in the diagnosis of meningoencephalitis: lights and shadows
Open accessAbstract
PURPOSE: We aimed to evaluate the performance of the FilmArray (FA) meningitis/encephalitis (ME) panel. Secondarily, we analyzed the false positive (FP) and false negative (FN) results, as well as the predictive values of the technique, regarding the cerebrospinal fluid (CSF) characteristics. METHODS: FA is a multiplex real-time PCR detecting 14 of the most common ME pathogens in CSF. All FA performed at our hospital (2018-2022) were retrospectively reviewed. FA was compared to conventional techniques and its performance was assessed based on the final diagnosis of the episode. RESULTS: FA was performed in 313 patients with suspicion of ME. Most patients had altered mental status (65.2%) and fever (61%). Regarding CSF characteristics, 49.8% and 53.7% presented high CSF proteins and pleocytosis, respectively. There were 84 (26.8%) positive FA results, mainly for HSV-1 (10.9%), VZV (5.1%), Enterovirus (2.6%), and S. pneumoniae (1.9%). In the 136 cases where both FA and routine methods were performed, there was a 25.7% lack of agreement. We identified 6.6% FN results, but 28.6% FP, mainly due to HSV-1. This resulted in a high negative predictive value (NPV) of 93.4%, but a positive predictive value (PPV) of 73%. Remarkably, PPV as low as 36.9%, and 70.2%, were found in cases without pleocytosis, or lack of high CSF protein levels, respectively. CONCLUSION: FA was associated with high NPV, but frequent FP results and low PPV, particularly for HSV-1, and especially in patients without high CSF protein levels or pleocytosis.
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Published positivity rates for CSF multiplex PCR range from 18.8% to 32.8%.
“Published positivity rates for CSF multiplex PCR range from 18.8% to 32.8%10, 11, 12, aligning with our positivity rate of 24.3%.”
From Clinical Impact of Cerebrospinal Fluid Multiplex Polymerase Chain Reaction (PCR) Testing in Children with Suspected Central Nervous System Infection (2025) · cites this paper as [10]
The Results (Table 3; page unavailable) report a 26.8% positive FilmArray rate, which falls within the claimed range. But the Discussion (page unavailable) describes prior studies’ positivity rates as 8–25%, not 18.8–32.8%; this source does not support the stated endpoints. (LLM, conf=0.86)
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- Authors
- López, N., Cuesta, G., Rodríguez-Vega, S., Rosas, E., Chumbita, M., Casals-Pascual, C., Morata, L., Vergara, A., Bodro, M., Bosch, J., Herrera, S., Martínez, J. A., Mensa, J., Garcia-Vidal, C., Marcos, M. Á., Vila, J., Soriano, A., & Puerta-Alcalde, P.
- Affiliations
- Hospital Clínic de Barcelona (ES)
- Hospital Universitario De Cabueñes (ES)
- Centro de Investigación Biomédica en Red (ES)
- ORCID
- Venue
- Infection
- Published
- 2023-07-29
- Volume
- 52
- Issue
- 1
- Pages
- 165-172
- ISSN
- 0300-8126 (ISSN-L)
- 1439-0973
- PMC
- PMC10810907
- OpenAlex
- W4385380208
- Cited by
- 21
- References
- 17
- Citations by year
- 2026: 5 · 2025: 9 · 2024: 7
- FWCI
- 4.32
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- Infection (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Dipòsit Digital de la Universitat de Barcelona (Universitat de Barcelona) (submittedVersion, cc-by)
- TECNALIA Publications (Fundación TECNALIA Research & Innovation) (submittedVersion, public-domain)
- Funders
- Instituto de Salud Carlos III (JR20/00012, PI21/00498, ICI21/00103)
- Universitat de Barcelona
- Topics
- Health Sciences › Medicine › Infectious Diseases › Infectious Encephalopathies and Encephalitis
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Clinical Biochemistry › Bacterial Identification and Susceptibility Testing
- Life Sciences › Immunology and Microbiology › Microbiology › Bacterial Infections and Vaccines
- Keywords
- FilmArray Meningitis/Encephalitis panel, meningitis, encephalitis, cerebrospinal fluid, multiplex real-time PCR, diagnostic accuracy, false positives, herpes simplex virus type 1, false-negative results, pleocytosis, cerebrospinal fluid protein, predictive value, viral meningitis
- MeSH terms
- Encephalitis, Humans, Leukocytosis, Meningitis, Meningoencephalitis, Retrospective Studies, Multiplex Polymerase Chain Reaction, Real-Time Polymerase Chain Reaction
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