Which genus name is currently used for the organism formerly known as Pityrosporum?

Which genus name is currently used for the organism formerly known as Pityrosporum?

• A. Malassezia
• B. Microsporum
• C. Candida
• D. Cryptococcus

Answer: (A)

Taxonomic revision moved the lipophilic skin yeast previously named Pityrosporum into the genus Malassezia. Molecular studies showed these yeasts form a distinct lineage of basidiomycetous yeasts and rely on lipids for growth, so they’re grouped under Malassezia rather than the older name. This genus now includes species formerly called Pityrosporum, which are associated with conditions like pityriasis versicolor and seborrheic dermatitis. The other genera listed refer to different types of fungi—Microsporum are dermatophytes, Candida encompasses various yeasts causing candidiasis, and Cryptococcus includes encapsulated yeasts—so Malassezia is the correct current genus.

Taxonomic revision moved the lipophilic skin yeast previously named Pityrosporum into the genus Malassezia. Molecular studies showed these yeasts form a distinct lineage of basidiomycetous yeasts and rely on lipids for growth, so they’re grouped under Malassezia rather than the older name. This genus now includes species formerly called Pityrosporum, which are associated with conditions like pityriasis versicolor and seborrheic dermatitis. The other genera listed refer to different types of fungi—Microsporum are dermatophytes, Candida encompasses various yeasts causing candidiasis, and Cryptococcus includes encapsulated yeasts—so Malassezia is the correct current genus.