Researchers in North Carolina identified a drug-resistant yeast infection (Candida tropicalis) from a hospital patient and tested whether extracts from reishi mushrooms (Ganoderma lucidum) could kill it. Using genetic analysis, they found mutations in the yeast that help it resist antifungal drugs. All three types of mushroom extracts tested successfully stopped the yeast’s growth and damaged its cells, suggesting that reishi mushrooms could be a promising natural treatment option for hard-to-treat candida infections.