This document discusses the structure, growth, and types of medical mycoses (fungal infections). It notes that fungi have cell walls containing chitin and beta-glucan, and cell membranes containing ergosterol, which are targets of antifungal drugs. There are two main types of fungi - yeasts and molds. Medical mycoses are divided into cutaneous (skin), subcutaneous, systemic, and opportunistic categories. Common cutaneous mycoses include ringworm, athlete's foot, jock itch, and nail fungal infections caused by dermatophyte fungi. Candidiasis is caused by Candida species and can cause oral or vaginal infections when bacteria levels are