DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Cutaneous leishmaniasis lesion on a 17-year-old male patient's leg, close-up. This skin condition is caused by infection by Leishmania protozoan parasites. They are transmitted to humans through the bite of an infected sandfly. The cutaneous (skin) form is the most common. The lesions generally heal, though scarring is possible. Treatment is by drugs or by cryotherapy. Leishmania parasites are found in subtropical and tropical regions worldwide. In this case the infection was by a Viannia subgenus and occurred in Peru.
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