| Term | Definition |
|---|
| What is Tinea Versicolor/ Pityriasis versicolor | a superficial fungal skin infection that manifests as patches of hypopigmentation or hyperpigmentation; does not tan upon sun exposure |
| What organism causes pityriasis versicolor? | Malassezia furfur and Malassezia globosa |
| What is tinea nigra? | A superficial fungal infection causing brown/black painless patches on the soles and hands of feet |
| What organism causes tinea nigra | Hortaea werneckii or Exophiala werneckii |
| Treatment for tinea versicolor or tinea nigra | Antidandruff shampoo with selenium sulfide; topical imidazole |
| How are Malassezia furfur and Exophiala werneckii visualized? | KOH on skin scrapings; KOH will digest everything else but the fungi. Malassezia look like spaghetti and meatballs |
| how imidazoles work | prevent ergosterol synthesis by binding cytochrome p450 alpha demethylase |
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