A Case of Topical Ofloxacin-Induced Otomycosis and Literature Review.

The prevalence of fungal otitis externa, or otomycosis, has been increasing in recent decades. Fungi may act as primary pathogens in this condition, or they may occur as secondary infections after prolonged ototopical treatment with antibiotics, which alters the flora of the external auditory canal (EAC) and enables overgrowth of its fungal inhabitants. We report here a case of otomycosis by Candida parapsilosis, Malassezia obtusa, and Malassezia furfur as a secondary infection following prolonged otic ofloxacin treatment. To the best of our knowledge, although isolation of C. parapsilosis and M. furfur from the EAC is not uncommon, the recovery of M. obtusa has not yet been reported. We also conducted a literature review of the searchable data on PubMed concerning the isolation of Malassezia species from the human EAC.