<prompt> Most common fungus causing otomycosis isHistoplasmaCandidaMucorPenicillin  <response>: Otomycosis is a fungal infection of the ear canal most commonly caused by Candida albicans, Aspergillus niger and Aspergillus fumigatus. Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, of no. 55 