This research investigates how lung mucus and its mucin molecules defend against Coccidioides, the fungus that causes Valley fever. By showing that mucins slow fungal growth, the work suggests mucus shapes infection before symptoms appear, opening new possibilities for earlier diagnosis and treatments against Valley fever and other infectious diseases.

Fungal infections are becoming harder to treat as fungi rapidly evolve resistance to limited antifungal drugs. This research reveals that large, multi-gene mutations—once overlooked—are common in resistant fungi. Understanding these dramatic genetic changes is critical for developing more effective antifungal therapies.