# Onychomycosis Caused by Aspergillus niger in an Immunocompetent Young Female: A Case Report of a Rare Presentation

## TL;DR

A 25-year-old healthy woman developed a rare fungal nail infection caused by Aspergillus niger, typically seen in people with weakened immune systems.

## Contribution

Reports an unusual case of onychomycosis in an immunocompetent individual caused by Aspergillus niger.

## Key findings

- Aspergillus niger can cause onychomycosis in immunocompetent individuals.
- The infection presented as a single fingernail involvement in a young female.
- This case highlights the expanding clinical spectrum of non-dermatophyte mold infections.

## Abstract

Onychomycosis is a fungal infection of the nail that may result from dermatophytes, non-dermatophyte molds, or yeasts. Among non-dermatophyte molds, Aspergillus niger is a recognized species with the potential to cause nail infections. While such infections were traditionally reported in immunocompromised individuals, they have also been increasingly observed in immunocompetent hosts. This condition carries clinical importance due to its potential for recurrence and resistance to treatment. Herein, we present a case of a 25-year-old immunocompetent female with a single fingernail onychomycosis caused by A. niger.