01152nas a2200133   4500000000100000008004100001260003800042100001900080245005500099300001200154520080900166022002500975020001801000       2021                            d  bSpringer International Publishing1 ade Nakamura RC00aThe Nail Involvement in Leprosy and Sporotrichosis  a113-1273 aTropical diseases refer to infectious diseases that often become chronic infectious diseases. These can be grouped, based on the microorganism, into bacterial, fungal, and viral. Among them are leprosy and sporotrichosis. Leprosy is a destructive bacterial disease, and sporotrichosis is caused by dimorphic fungi with saprobiotic life in nature. As that affects the hands, fingers, and nail unit, leprosy can affect more frequently nail unit than sporotrichosis. A high index of suspicion is required for the early diagnosis of tropical diseases. They may occur in the nail unit on primary form or more rarely in the disseminated form. Each type of bacterial or fungal infection has a “classic” presentation. We will discuss these diseases and their presentations, form of diagnosis, and management.  a2523-8884, 2523-8892  a9783030599966