Candidiasis is a fungal infection with Candida species, predominantly with Candida albicans. Invasive candidiasis is a major cause of morbidity and mortality in the intensive care unit (ICU) setting, causing bloodstream infections. Recently, various non-C. albicans species have emerged as infecting agents. In patients with impaired IL-17 immunity, recurrent or persistent infections are observed (chronic mucocutaneous candidiasis disease).