At a routine examination, multiple colonies of hyphomycetes of uncommon morphology were isolated from two patients with clinically suspected mycosis of the big toes (and confirmed microscopically by the presence of fragmented/thin hyphae). Based on the detailed study of the morphological and physiological characteristics of the cultures, the isolates were identified as Arthrographis kalrae. To our knowledge, this is the first isolation of the thermally dimorphic keratinolytic fungus to be reported in Slovakia.

        Key words: Arthrographis kalrae – morphology – onychomycosis