A case of onychomycosis due to Aspergillus sydowii diagnosed using DNA sequence analysis.

We report a case of disto-lateral subungal onychomycosis of the first toe of the right foot of a 33-year-old female. The causative agent was identified as Aspergillus sydowii based on DNA sequencing and the macroscopic and microscopic characteristics of the culture. Initially, the medial one-third of the right first toenail was streaked with numerous yellow longitudinal stripes that had fused, with no symptoms of tinea pedis.