Infectious meningitis/encephalitis: evaluation of a rapid and fully automated multiplex PCR in the microbiological...

Area of Science:

• Clinical Microbiology
• Infectious Diseases
• Molecular Diagnostics

Background:

• Central nervous system (CNS) infections, including meningitis and encephalitis (ME), necessitate prompt etiological diagnosis for effective treatment.
• Conventional microbiological procedures (CMP) for diagnosing ME can be time-consuming, potentially delaying critical patient care.
• The development of rapid, automated diagnostic tools is crucial for improving the management of suspected CNS infections.

Purpose of the Study:

• To evaluate the analytical performance and clinical utility of a fully automated multiplex PCR test, the FilmArray™ (FA) ME Panel.
• To assess the FA ME Panel's ability to improve the microbiological diagnostic workup for patients with suspected ME.
• To compare the diagnostic speed and accuracy of the FA ME Panel against conventional microbiological procedures (CMP).

Main Methods:

• Seventy-seven cerebrospinal fluid (CSF) samples from patients with suspected ME were analyzed using the FA ME Panel.
• Results from the FA ME Panel were compared with those obtained from CMP.
• Assay validity was further confirmed using 5 pooled CSF samples containing known pathogens.

Main Results:

• A high concordance rate of 90.9% was observed between the FA ME Panel and CMP.
• Discrepancies were noted in samples with low viral loads and in patients receiving antifungal therapy.
• The FA ME Panel demonstrated significantly faster detection of bacterial and viral pathogens compared to CMP (P<0.001).

Conclusions:

• The automated FA ME Panel exhibits good analytical performance and clinical utility for diagnosing ME.
• This multiplex PCR test provides a faster microbiological diagnosis, potentially enhancing patient management strategies.
• Implementation of the FA ME Panel can streamline the diagnostic workflow for suspected CNS infections.