Visceral leishmaniasis (VL) or Kala-azar is the most severe form of leishmaniasis and is uniformly fatal, if untreated. An estimated 500,000 new cases occur per year, 90% of which occur in the endemic areas of India, Bangladesh, Sudan Nepal and Brazil. More than 100,000 cases of VL occur in India alone every year and the state of Bihar accounts for more than 90% of these. Over the years new the...