Leishmania tropica is a tropical parasite that is primarily transmitted to humans by the bite of the sandfly. It is found in most tropical and sub-tropical countries around the world. L. tropica is a mayor parasite of dogs and rodents and is associated with rural disease. Cutaneous leishmaniasis (CL) is a skin infection caused by the hemoflagellate Leishmania. CL lesions are characterized by an ulcer with indurated borders and a necrotic base that often heals without treatment months after the initial infection.