Leishmania donovani is a parasite that causes the disease visceral leishmaniasis, also known as kala-azar. This research area focuses on understanding the biology, epidemiology, and transmission of Leishmania donovani, as well as developing new treatments and control strategies for visceral leishmaniasis. Researchers study the life cycle of the parasite, host-parasite interactions, drug resistance, and immune responses to infection. The goal of this research is to improve diagnosis, treatment, and prevention of visceral leishmaniasis in endemic regions around the world.