Laboratory Data

With a Wood's lamp a golden-yellowish color is seen, especially in mild cases. The direct exam with KOH, the scotch tape test, black chlorazol and Parker blue ink show spores 3-6 ^m and short filaments, "spaghetti and meatballs" (Fig. 2.4). Culture is not necessary but it has been performed in enriched agar with lipids like 10% olive oil. The intradermal skin test is not of practical use. Biopsy is not necessary, but with hematoxylin-eosin, PAS and Gomori-Grocott stains, yeasts and filaments can be seen in the horny layer or in the pilar infundibulum. In folliculitis a granulomatous or lymphohistiocytic infiltrate is seen in the involved hairs.

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