“…Dear Editor, Aspergillus niger and related species that belong to Aspergillus section Nigri cause primary cutaneous aspergillosis, particularly in immunocompromised individuals. 1 Recent DNA sequencing of the calmodulin and β-tubulin genes enabled classification of the taxonomy of this section and determinations of their drug sensitivity and resistance mechanisms. 2,3 We present the first reported case of primary cutaneous aspergillosis caused by A. welwitschiae, a distinct species of Aspergillus section Nigri, successfully identified by DNA sequencing, which also contributed to the identification of effective topical drugs.…”