Mass Spectrometry Applications for Fungal Identification

Mass spectrometry has revolutionised the field of fungal diagnostics by enabling rapid, accurate and high‐throughput identification of yeasts, moulds and other filamentous fungi. Central to this approach is the generation of proteomic fingerprints from cultured fungal colonies, which are compared against robust reference libraries to achieve species‐level resolution. Techniques such as matrix‐assisted laser desorption ionisation–time of flight mass spectrometry (MALDI-ToF MS) have supplanted many labour‐intensive phenotypic assays, reducing turnaround times from days to hours. Beyond clinical mycology, mass spectrometry applications extend to environmental monitoring, food safety and biotechnological strain selection, where the precise discrimination of closely related taxa informs treatment decisions, contamination control and the optimisation of enzyme production. Advances in sample preparation, database curation and instrument parameter settings continue to enhance sensitivity, broaden species coverage and lower identification thresholds, thereby expanding the global impact of mass spectrometry in fungal identification and surveillance.

Research from Nature Portfolio

Recent studies have demonstrated that optimising instrument settings can markedly improve MALDI-ToF MS performance for fungal targets. For example, the development of ‘Peak MALDI’ parameter adjustments on a commercial biotyper platform has been shown to enhance signal sensitivity, refine spectral quality and elevate identification confidence for a wide range of fungal organisms. These optimised acquisition programmes minimise the reliance on extensive sample processing and expand the dynamic range of detectable proteins, thus facilitating reliable species determination across both yeast and filamentous fungi.

Mass Spectrometry Applications for Fungal Identification publication trend

The graph below shows the total number of articles in mass spectrometry applications for fungal identification across all publications each year (not limited to Nature Index journals).

Technical terms

Matrix-assisted laser desorption ionisation–time of flight mass spectrometry (MALDI-ToF MS): A proteomic method that uses a laser to ionise microbial proteins and measures their mass-to-charge ratios to produce unique spectral fingerprints for organism identification.

Formic acid extraction: A sample preparation technique employing formic acid to lyse fungal cells and release proteins, improving spectral reproducibility and identification rates.

Spectral library (reference database): A curated collection of mass spectra from known fungal species used as a comparative reference to identify unknown isolates by pattern matching.

Direct analysis in real time (DART): An ambient ionisation technique that generates mass spectra directly from samples under atmospheric conditions, enabling rapid microbial profiling without extensive preparation.

Proteomic fingerprinting: The process of obtaining a characteristic pattern of protein masses from an organism to discriminate species or strains through mass spectrometry.

References

1. Evaluation of two MALDI-TOF MS systems and extraction methods for identification of filamentous fungi recovered from clinical specimens. Journal of Clinical Microbiology (2025).
2. Evaluation of the Autof ms1000 mass spectrometry for rapid clinical identification of filamentous fungi. BMC Microbiology (2023).
3. An easy adjustment of instrument settings (‘Peak MALDI’) improves identification of organisms by MALDI-ToF mass spectrometry. Scientific Reports (2023).
4. Application of MALDI TOF and DART mass spectrometry as novel tools for classification of anaerobic gut fungi strains. Analytical and Bioanalytical Chemistry (2025).