Australian Natural Antimicrobials for Candida auris Emergency Context Evidence Synthesis

Executive Summary Candida auris represents a critical global health emergency due to its multidrug resistance, environmental persistence, and high mortality rates. With over 7,000 confirmed cases in the United States as of late 2025 and spreading resistance patterns, conventional antifungal approaches are increasingly limited. Australian natural products, specifically eucalyptus oils and native honeys, demonstrate documented antimicrobial properties that warrant urgent investigation as adjunctive measures in C. auris infection control protocols. These products are commercially available, have established safety profiles for topical use, and fall under less restrictive regulatory frameworks than pharmaceutical interventions. Key evidence synthesis findings include membrane-disrupting properties of eucalyptus oil compounds (particularly 1,8-cineole), biofilm inhibition capabilities, and synergistic effects with existing antifungal agents. Native honey preparations show additional promise for surface decontamination and skin barrier protection - critical factors in C. auris transmission prevention. This Seeded Idea Paper proposes time-sensitive institutional consideration of these natural antimicrobials in infection control protocols while research continues. Simple applications such as eucalyptus-enhanced hand soaps and honey-based skin preparations could provide additional protection layers with minimal regulatory barriers. The ecological homeostasis approach underlying this analysis emphasizes sustainable, relationship-based solutions over pharmaceutical monocultures that have contributed to resistance development. Australian natural products represent co-evolved antimicrobial systems with intrinsic diversity that may prove more resilient than single-compound approaches.