Three districts, Saran, Simastipur and Muzaffarpur in the VL endemic state of Bihar in India will be selected for the study. Initially, 300 eligible patients will be diagnosed and treated at hospital level with liposomal amphotericin B, using a single dose of 10 mg/kg. If no significant feasibility or safety issues are identified in this group of patients, 1000 additional subjects will be diagnosed and treated at the PHC level. Feasibility will be determined by the proportion of patients attending the PHCs treated with single dose AmBisome and the proportion of patients that need to be referred to the district hospitals for management of adverse events. The initial cure rate will be determined at day 30, after end of treatment (EOT). If initial cure is observed, the patient will be followed up and evaluated 6 months after the end of treatment for final clinical cure.