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  • Title: Prevalence of different Malassezia species in pityriasis versicolor in central India.
    Author: Chaudhary R, Singh S, Banerjee T, Tilak R.
    Journal: Indian J Dermatol Venereol Leprol; 2010; 76(2):159-64. PubMed ID: 20228545.
    Abstract:
    BACKGROUND: In the last 10 years, different studies have shown interesting geographical variations in the prevalence of different Malassezia species in pityriasis versicolor. AIM: Identification of Malassezia species isolated from patients with pityriasis versicolor. METHODS: In 100 patients with pityriasis versicolor, Malassezia species were identified by culture in Sabouraud's dextrose agar containing cycloheximide with olive oil overlay and modified Dixon agar and by doing biochemical tests (catalase reaction, assimilation of glycine, and Tween utilisation tests). RESULTS: In 10 patients, 10% KOH smear was negative, while in 90 patients the smear showed characteristic "spaghetti and meatball" appearance. Of these 90 cases, growth was obtained on modified Dixon's agar in 87 cases. Fifty of the isolates (57.5%) were M. globosa, 15 (17.2%) were M. sympodialis, seven (8.0%) were suspected M. sympodialis, 6 (6.9%) each of the isolates were M. furfur and M. obtusa, and three (3.4%) isolates were M. restricta. CONCLUSION: M. globosa was the most common species, followed by M. sympodialis, M. furfur, M. obtusa, and M. restricta.
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