In clinical mycology, MALDI-TOF mass spectrometry is primarily used for which purpose?

• A. Rapid species-level identification of fungal isolates from culture
• B. Determining antifungal susceptibility
• C. Detecting fungal toxins
• D. Visualizing fungal spores under light microscopy

Answer: (A)

The main concept being tested is the role of MALDI-TOF mass spectrometry in clinical mycology. MALDI-TOF MS identifies fungi by analyzing the organism’s protein fingerprint and comparing it to a reference database, yielding rapid, species-level identification from cultured isolates. This makes it a fast and practical tool for determining exactly which fungal species is present after growth, which is essential for guiding therapy. It’s not primarily used to determine antifungal susceptibility, detect fungal toxins, or visualize spores under the microscope; those tasks rely on different methods (MIC testing or genetic/chemical assays, specialized toxin assays, and microscopy, respectively). So the best fit is rapid species-level identification from culture.