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New Contrast Stain for the Rapid Diagnosis of Pityriasis Versicolor
Siew-Lin Lim, MBBS;
Christopher Seng-Hong Lim, MBBS
Arch Dermatol. 2008;144(8):1058-1059.
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Successful treatment of pityriasis versicolor requires an accurate diagnosis. Culture is not useful because its etiologic agent Malassezia furfur is part of the normal skin flora. Hence, diagnosis is usually based on direct microscopic examination of skin scrapings. The standard potassium hydroxide (KOH) wet mount suffers from a lack of color contrast. Parker blue-black ink has been added to potassium hydroxide to highlight fungal hyphae and spores against the surrounding cellular debris.1-2 The fluorescent brightener calcofluor white specifically binds to chitin, but this method incurs the additional cost of a fluorescence microscope.3 In this study, we compared a new contrast stain with the Parker-KOH stain in patients with a clinical diagnosis of pityriasis versicolor.
Methods
The study population comprised male and female patients who were diagnosed as having pityriasis versicolor by the dermatologist Kah-Beng Lim, MRCP(UK) (K.B.L.).
Areas of skin to be scraped were . . . [Full Text of this Article] Contrast Stain Parker-KOH Stain
Results
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Arch Dermatol 2008;144:1228-1229.
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