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Pityriasis versicolor.

A K Gupta1, R Bluhm, R Summerbell

  • 1Department of Medicine, Sunnybrook and Women's College Health Science Center, Toronto, Ontario, Canada. agupta@execulink.com

Journal of the European Academy of Dermatology and Venereology : JEADV
|April 16, 2002
PubMed
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Pityriasis versicolor is a common skin infection caused by Malassezia yeast. This fungus transforms into a pathogenic form, leading to skin inflammation and characteristic changes, requiring specific diagnosis and treatment.

Area of Science:

  • Dermatology
  • Mycology
  • Infectious Diseases

Background:

  • Pityriasis versicolor is a superficial fungal infection.
  • It is caused by Malassezia species, which are normal skin inhabitants.
  • Under specific conditions, Malassezia can transition from yeast to a pathogenic mycelial form, causing skin inflammation.

Purpose of the Study:

  • To understand the role of Malassezia in pityriasis versicolor development.
  • To outline the clinical and histological changes associated with this dermatosis.
  • To review the diagnosis and treatment strategies for pityriasis versicolor.

Main Methods:

  • Review of current literature on Malassezia and pityriasis versicolor.
  • Analysis of taxonomic updates for Malassezia species.

Related Experiment Videos

  • Correlation of fungal morphology changes with clinical presentation.

    • Main Results:

    • Malassezia species are implicated in pityriasis versicolor pathogenesis.
    • The transformation of Malassezia from yeast to mycelial form is key to disease development.
    • Recent taxonomic revisions include six obligately lipophilic and one non-obligately lipophilic Malassezia species.

    Conclusions:

    • Awareness of Malassezia's role is crucial for understanding pityriasis versicolor.
    • Recognizing clinical and histological features aids diagnosis.
    • Effective treatment relies on accurate diagnosis and management of this fungal infection.