On the Origin of Candida auris: Ancestor, Environmental Stresses, and Antiseptics.

Candida auris has emerged as a serious threat to the health care settings. Advancements in molecular biology have provided several insights into the evolution of C. auris since it was first described in 2009. However, the simultaneous emergence of four different clades of the fungus at distinct geographical locations remains a mystery. The hypotheses already proposed by researchers fall short of explaining how and why C. auris emerged. In this article, we theorize that C. auris emerged from a common ancestor, subsequently migrated to specific geographical locations, and diversified genetically. This hypothesis is supported by genomic insights, historical events, and indirect scientific facts. C. auris adapted to humans at locations and times coinciding with the divergence from the most recent common ancestor, emerging almost simultaneously as an opportunist pathogen due to antiseptic practices. Future research will support or refute this hypothesis.