The drug-resistant fungal species Candida auris, known for its ability to grow and persist on human skin, is becoming more lethal and is spreading worldwide, as per a study led by Indian researchers. The study, conducted by researchers from the Vallabhbhai Patel Chest Institute at the University of Delhi in collaboration with the National Institutes of Health in the US, revealed that invasive fungal infections are on the rise globally, affecting around 6.5 million individuals annually. These infections, with mortality rates often exceeding 50%, pose a significant health threat, even with antifungal treatment.
Candida auris has evolved various cellular strategies for survival, such as morphogenesis enabling it to switch from yeast growth to filament-driven spread, forming multicellular aggregates, and altering its genetic expression in response to environmental changes. The fungus is highly adept at colonizing human skin, with its cell wall proteins attaching like glue to both living and non-living surfaces. Long-term skin colonization by Candida auris raises concerns as colonized patients can facilitate the transmission of the fungus within and between hospitals, increasing the risk of severe systemic infections.
Despite the host’s immune response against Candida auris, the fungus can develop mechanisms to evade detection. Diagnostic challenges persist as conventional lab tests often misidentify the fungus as other yeasts, leading to delays in treatment. However, there is a growing awareness of the threat posed by Candida auris, prompting increased research efforts to address clinical needs.
Efforts are needed to develop novel broad-spectrum antifungal agents, enhance diagnostic tests, and create immune- and vaccine-based treatments for high-risk patients, as highlighted by the researchers. The study also emphasizes the importance of raising awareness about fungal diseases and improving surveillance systems, particularly in resource-limited countries.
