An Epidemiological, Clinical, and Mycological Study of Human Ringworm Due to Trichophyton Verrucosum in Japan

The study examined 58 cases of human ringworm caused by Trichophyton verrucosum in Japan, focusing on epidemiological, clinical, and mycological aspects. Most patients were farm workers or their families, with infections peaking in winter. The study identified six types of lesions, with common sites being the forearm in adults and the face in children. The lesions were characterized by intense inflammation and lacked central clearing. The fungus was found to grow better at 37 °C and was inhibited by actidione. Oral treatment with griseofulvin was recommended for certain lesion types. Additional cases were reported in Hokkaido and southwestern Japan.