A Nature Communications study used wastewater-based epidemiology to detect the emergence of clinically significant and drug-resistant Candida auris strains in healthcare settings, mapping how resistant variants appear over time. The approach, reported by Chang, Moshi, Nguyen and colleagues, positions wastewater monitoring as a potentially scalable surveillance layer that can flag resistant pathogen emergence without requiring individual culture-based sampling. For infection-control teams, the work targets a key bottleneck: early detection of resistance signals before they translate into difficult-to-treat outbreaks.