Tinea versicolor

Christopher J. Hoffmann, M.D., M.P.H.
Tinea versicolor is a topic covered in the Johns Hopkins ABX Guide.

To view the entire topic, please log in or purchase a subscription.

Official website of the Johns Hopkins Antibiotic (ABX), HIV, Diabetes, and Psychiatry Guides, powered by Unbound Medicine. Johns Hopkins Guide App for iOS, iPhone, iPad, and Android included. Explore these free sample topics:

Johns Hopkins Guides

MonkeypoxMonkeypox

Coronavirus COVID-19 (SARS-CoV-2)Coronavirus COVID-19 (SARS-CoV-2)

Suicide Risk in the COVID-19 PandemicSuicide Risk in the COVID-19 Pandemic

Moderna COVID-19 VaccineModerna COVID-19 Vaccine

BNT162b2 COVID-19 Vaccine (BioNTech/Pfizer)BNT162b2 COVID-19 Vaccine (BioNTech/Pfizer)

Managing Stress and Coping with COVID-19Managing Stress and Coping with COVID-19

Johnson & Johnson COVID-19 VaccineJohnson & Johnson COVID-19 Vaccine

-- The first section of this topic is shown below --

PATHOGENS

  • Malassezia furfur (Pityrosporum ovale): the pathogen in a majority of cases.
  • Malassezia globosa
  • Malassezia symphodialis
  • Malassezia silffiae
  • Growth of these yeasts in cultures requires special media.
    • Sabouraud dextrose agar overlaid with olive oil required with incubation at 30°C.
      • Other strategies include:
        • Modified Leeming and Notham agar (Kanekoet al.2007)
        • Modified Dixon’s agar
        • CHROMagar Malassezia medium is commercially available and isolates most common Malassezia species.
    • Colonies often difficult to distinguish in the oil layer.

-- To view the remaining sections of this topic, please log in or purchase a subscription --

PATHOGENS

  • Malassezia furfur (Pityrosporum ovale): the pathogen in a majority of cases.
  • Malassezia globosa
  • Malassezia symphodialis
  • Malassezia silffiae
  • Growth of these yeasts in cultures requires special media.
    • Sabouraud dextrose agar overlaid with olive oil required with incubation at 30°C.
      • Other strategies include:
        • Modified Leeming and Notham agar (Kanekoet al.2007)
        • Modified Dixon’s agar
        • CHROMagar Malassezia medium is commercially available and isolates most common Malassezia species.
    • Colonies often difficult to distinguish in the oil layer.

There's more to see -- the rest of this entry is available only to subscribers.

© 2000–2022 Unbound Medicine, Inc. All rights reserved