Onychomycosis caused by Aspergillus species belonging to section Circumdati.

We encountered two cases of onychomycosis caused by Aspergillus (A.) subramanianii and A. sclerotiorum. These species belong to the Aspergillus section Circumdati, which is reportedly common in a wide range of habitats. The members of section Circumdati rarely cause onychomycosis. We report the second and fifth cases of A. subramanianii and A. sclerotiorum in the world. Positive findings in dermatophyte antigen kits helped us to diagnose these infections. These isolates were sensitive to ravuconazole, with a minimum inhibitory concentration of  0.5 μg/mL. They were successfully treated with oral fosravuconazole. We discuss 14 cases of onychomycosis caused by Aspergillus section Circumdati.