Rapid clinical detection of mycobacterial infections using M-Typer and flow-injection tandem mass spectrometry
Year: 2025
Type: article
Abstract: OBJECTIVES: We evaluated the utility of the M-Typer® assay, based on flow-injection tandem mass spectrometry mycolic acid profiling, in the diagnosis of TB and other mycobacterial infections. METHODS: species was first evaluated using 40 clinical strains of known species. In the second phase, clinical specimens from 451 patients with suspected TB or non-tuberculous mycobacteria (NTM) infections were tested. Results were compared with those obtained from Xpert MTB/RIF and MGIT culture. RESULTS: complex or NTM, and 80% were accurately identified to species level. In clinical specimens, it showed high sensitivity (94.4%) and specificity (93.63%) for TB diagnosis compared to Xpert MTB/RIF. Similar values were observed versus MGIT culture (sensitivity: 93.75%; specificity: 95.77%). However, the assay's positive predictive value (PPV) was lower (70.8% vs. Xpert MTB/RIF; 45.45% vs. MGIT culture). DISCUSSION: The M-Typer® assay demonstrated diagnostic accuracy comparable to established methods, supporting its potential role in clinical microbiology for rapid, direct detection and species-level identification of mycobacteria. Nevertheless, its relatively low PPV indicates the need for further optimisation and validation in diverse clinical settings.
Source: IJTLD OPEN
Authors: A. Głogowska, K. Majewski, B. Szulc, K. Kowalski, E. Augustynowicz-Kopeć
Language: English
Subfield: Infectious Diseases
Field: Medicine
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W4417319503