Leishmaniasis is a parasitic disease that is transferred to humans through the bite of the sand fly. Most of the cutaneous form of the disease is found in the Middle East, while the parasite that attacks organs is located mostly in Asia or South America. However, leishmaniasis has been found in over 90 tropical countries and U.S. states that border Mexico. Generally the parasite causes skin lesions that appear weeks or months after the infection. If untreated these subcutaneous sores can last for years. If the visceral form is left untreated, death is often the result.