Pityrosporum infections

Pityrosporum ovale is a lipophilic yeast that is part of the normal human adult cutaneous flora. It is both a saprophyte and an opportunistic pathogen associated with pityriasis versicolor, Pityrosporum folliculitis, seborrheic dermatitis, and some forms of atopic dermatitis. Systemic infections have also been described. In this article the diagnosis and management of pityriasis versicolor, Pityrosporum folliculitis, seborrheic dermatitis, and atopic dermatitis will be discussed.