Work

Diagnostic Performance of the QIAstat‐Dx Meningitis/Encephalitis Panel: Insights From Seven Clinical Evaluations

Year: 2026

Type: article

Abstract: Central nervous system (CNS) infections require prompt and accurate diagnosis to enable timely and targeted antimicrobial therapy. Syndromic PCR-based assays, such as the QIAstat-Dx Meningitis/Encephalitis Panel (QIA-ME), allow rapid detection of key pathogens directly from cerebrospinal fluid (CSF). We conducted a narrative review of seven studies (2023-2025) evaluating the diagnostic performance of QIA-ME. A total of 1007 clinical CSF samples, ranging from 5 to 585, were retrospectively analyzed, with 8 to 14 targets assessed per study. Positive percent agreement (PPA) ranged from 90.6% to 100%, while negative percent agreement (NPA)-available in only three studies-ranged from 75.0% to 97.7%. In three studies, head-to-head comparisons with the BioFire FilmArray Meningitis/Encephalitis Panel (FA-ME) revealed minimal variation in performance, reinforcing the robustness of QIA-ME. However, target-specific limitations were noted, particularly for herpesviruses such as HSV-1. Methodological heterogeneity across studies-in terms of design, comparator methods, and sample size-limits generalizability. The exclusion of cytomegalovirus and inclusion of Mycoplasma pneumoniae and Streptococcus pyogenes in the QIA-ME panel raise concerns about the clinical utility of low-prevalence targets, especially as M. pneumoniae was not detected in any clinical sample. Despite these limitations, the integration of amplification curve analysis and the strong concordance with FA-ME support QIA-ME as a valuable tool for CNS infection diagnostics. Prospective real-world studies are warranted to clarify the clinical value of individual targets and guide appropriate use across varied patient settings.

Source: MicrobiologyOpen

DOI: 10.1002/mbo3.70079

Authors: Flora Marzia Liotti, Brunella Posteraro, Maurizio Sanguinetti, Giulia De Angelis

Institutions: Agostino Gemelli University Polyclinic, Istituti di Ricovero e Cura a Carattere Scientifico, Università Cattolica del Sacro Cuore

Language: English

Topic: Bacterial Identification and Susceptibility Testing

Subfield: Clinical Biochemistry

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $3,540