A primitive animal
Transmitted by an insect
Leishmanias cause a disease called leishmaniasis. This disease is transmitted by the bite of a small insect, the sandfly5. Leishmania can infect either the skin and mucous membranes6 causing cutaneous or mucocutaneous leishmaniasis or can also spread throughout the body, and end up in the bone marrow in particular. Some of these diseases are observed only in a few regions of the world (South America for example) depending on the Leishmania species found there.