Dermatophyte fungal infection of groin (excluding genitals), also called Jock Itch. Also see Tinea, Nagel Trichophyton, Epidermophyton Floccinum, Ringworm, and Dermatophytoses programs.Encyclopedia Entry for Tinea Cruris :Tinea cruris - Ringworm of the groin- Candida albicans (yeast), Trichophyton sp., and Epidermophyton floccosum (fungi)Encyclopedia Entry for Tinea Cruris :Tinea cruris (Jock itch). Source of disease: usually Epidermophyton floccosum, Trichophyton rubrum, and Trichophyton mentagrophytes