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Yeungnam Univ J Med > Volume 5(2); 1988 > Article
Yeungnam University Journal of Medicine 1988;5(2):53-58.
DOI: https://doi.org/10.12701/yujm.1988.5.2.53    Published online December 31, 1988.
Comparison of KOH Positivity According to Sites of the Ring-shaped Dermatophytotic Skin Lesion.
Dong Hoon Shin, Jong Soo Choi, Ki Hong Kim
Abstract
KOH examination is a simple, rapid and diagnostic procedure to confirm dermatophytic infections. It is important to select a proper examination site of the lesion. To determinate the proper examination site of the lesion, mycologic studies were done with multiple specimens collected from the center, margin and out of margin of the ring-shaped dermatophytic skin lesion on the 58 patients. The results were as follows. Positive rate of KOH wet smear was 94.8% at the center and 100% at the margin of the lesions, 22.4% at the 1 cm and 5.2% at the 2 cm out of the lesions. The more hyphae were found in the lesion, the more hyphae were found out of the lesion. Culture was done on the Sabouraud's glucose agar from the highest KOH positive area and the positive culture was 48 strains (82.8%) of 58 patients. These findings suggested that the ring-shaped active margin was the best site to examine mycologic studies.
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