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Occupational associations – 12 cases

Work contributed to the skin disorders discussed in this quiz.

For each of the twelve cases, study the image(s) and then answer the questions. You can click on the image to view a larger version if required.

Each case should take approximately 2 minutes to complete. There is a list of suggested further reading material at the end of the quiz.

Case 1

Kerion or inflammatory tinea faciei due to infection with Trichophyton verrucosum.

Dairy farmer.

Kerion occurs because of fungal infection deep within hair follicles and is more common with a zoophilic organism such as Trichophyton verrucosum, which normally infects cattle. In farmers it most often arises on exposed sites such as face or forearm. It characteristically presents as a swollen red plaque or nodule studded with sterile pustules. The degree of inflammation often means KOH microscopy of scrapings is negative but infected hair can easily be pulled out for mycological culture.

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