Pityriasis versicolor

Introduction. 

Pytiriasis versicolor is a superficial fungal infection caused by a yeast, Malassezia furfur. It causes hypopigmented lesions in dark-skinned and tanned people by interfering with melanin production.

Summary

• Cause: Malassezia furfur
• Microscopy: Oval yeast cells, occasional end-to-end short hyphae
• Symptoms: Hypo/hyperpigmented skin lesions
• Transmission: direct contact
• Complications: folliculitis
• Pathogenesis: Superficial growth in skin; interferes with melanin production
• Treatment: Topical azoles

References/Links

1. http://www.ak-medizin.de/pityrias/pity01.jpg
2. http://www.mycology.adelaide.edu.au/gallery/photos/malass10.html