Fungal Infections, Immunity and Diagnosis

Abstract

Fungal infections (mycosis) have emerged as significant global health concerns, particularly  among immunocompromised individuals. This comprehensive review examines the intricate interplay between fungal pathogens and host immunity, emphasizing the crucial roles of both innate and adaptive immune responses. The innate immune system serves as the first line of  defense, utilizing physical barriers, pattern recognition receptors, phagocytic cells, the complement system, and cytokines to detect and control fungal pathogens. Dendritic cells play a pivotal role in bridging innate and adaptive immunity by presenting fungal antigens to T cells, guiding specific immune responses. Through the coordinated actions of T helper cells, cytotoxic T cells, B cells, and antibodies, the adaptive immune system offers targeted and long-lasting protection against fungal infections. Despite these robust defense mechanisms, many fungi have evolved sophisticated evasion strategies that complicate immune responses and therapeutic interventions. Advances in diagnostic technologies, including PCR, immunodiagnostic assays, and AI-algorithm have significantly enhanced the early detection and management of fungal infections. Understanding the complex host-fungal interactions and leveraging recent diagnostic innovations are essential for improving outcomes in patients at risk of fungal diseases. This review highlights the need for ongoing research to develop more effective vaccines, immunotherapies, and diagnostic tools in combating the increasing burden of fungal infections.