A Rare Case of Alternaria citri Keratitis Successfully Treated with Voriconazole

The genus <i>Alternaria</i> comprises several species of dematiaceous hyphomycetes known to cause opportunistic infections in humans. Over the past two decades, fungal infections have emerged as a significant cause of morbidity and mortality, particularly among immunocompromised individuals. Such infections often occur following disruption of the skin or corneal epithelial barrier, especially in patients with pre-existing ocular conditions or compromised immune status. This case report describes a rare instance of fungal keratitis (FK) caused by <i>Alternaria citri</i> in a 71-year-old male who presented with an acute onset of eye infection. The patient showed a favorable response to treatment with voriconazole.