Slide 1. Dermatophyte
In this potassium hydroxide (KOH) preparation of skin scrapings, thick, septate, branching hyphae are visible. The fainter, thinner, circular lines in the background are the walls of the skin cells (squames). The fungal hyphae are much thicker and more retractile than the cell walls of the squames, over which they cross and with which they are often
confused by inexperienced examiners. The three genera of dermatophytes, Microsporum, Trichophyton, and Epidermophyton, are indistinguishable in KOH preparations.
In this potassium hydroxide (KOH) preparation of skin scrapings, thick, septate, branching hyphae are visible. The fainter, thinner, circular lines in the background are the walls of the skin cells (squames). The fungal hyphae are much thicker and more retractile than the cell walls of the squames, over which they cross and with which they are often
confused by inexperienced examiners. The three genera of dermatophytes, Microsporum, Trichophyton, and Epidermophyton, are indistinguishable in KOH preparations.
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