Aspergillus terreus is a species of fungus that produces secondary metabolites such as patulin, citrinin and gliotoxins, which are harmful to humans. It is known for its refractance to amphotericin B therapy. A. terreus is also used to metabolize “lovastatin,” a compound used in the pharmaceutical industry to regulate cholesterol levels. It is an etiologic agent of onychomycosis and otomycosis. It also causes, although infrequently, invasive aspergillosis in immunosuppressed patients.