It can cause death. Direct microscopic identification of leishmania is rapid and easy to perform but does not distinguish between species of the virus. In vitro culture from biopsy or lymph aspirate can be tested. If you live in a high risk area, keep your home clean of mosquitos. If you notice lesions on your body, notify your doctor immediately.
Early diagnosis means early treatment and better chance of survival.
The Interaction of Leishmania Species with Macrophages. Academic Press, 1992. Diagnosis of Cutaneous Leishmaniasis and Species Discrimination of Parasites by PCR and Hybridization. American Society for Microbiology, 1994. Elsevier Science Publishers B.V. 1992.