DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Close-up of the darkened fingernails in a 72 year old male patient with a fungal nail infection. This condition, known as onychomycosis or tinea unguium, is caused by various fungi, and here was being treated with the antifungal drug Terbinafine.
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