The prevalence of onychomycosis caused by non-dermatophyte infections is increasing. [1][2][3][4][5][6] Neoscytalidium dimidiatum is a major causative organism of non-dermatophyte skin and nail infections worldwide, especially in South America, Africa, Europe and Asia. 4,5,[7][8][9][10][11] Neoscytalidium dimidiatum infection rates were reported as 34% in France, 22% in Tobago and 9%-12% in Nigeria. 12 In Thailand, 20% of fungal foot infections and 36% of nail infections were due to N. dimidiatum. 2 The organism is generally regarded as