Mycology is the branch of biology that deals with the study of fungi. Fungi are a part of the natural environment and exist as saprophytes in nature. However, there are certain species that remain as normal flora in an immunocompetent host but are capable of causing opportunistic infections in an immunocompromised host.
Mycology includes the study of the structure, classification of various types of fungi, and also the pathogenesis, clinical manifestations, and laboratory diagnosis of fungal infections.