Kala Azar in South AsiaTherapeutic regimens for visceral leishmaniasis (also Kala azar, Dum dum fever or black fever), caused by parasitic protozoa of the Leishmania genus, evolve at a pace never seen before. Spread by tiny and abundant sand flies, the parasite infects internal organs and bone marrow and if left untreated will almost always result in the death of the host. In developing countries successful diagnosis and treatment are complicated by asymptomatic cases,