Diagnosis and treatment of VL is not easy. In endemic countries, only few health facilities have well-trained health workers and the equipment to perform proper diagnosis and case management. To be able to accurately map the distribution of VL cases and calculate incidence and population at risk, several factors come into play:
Identifying health facilities where the resources will be targeted (training, equipment, drugs, diagnostic tests),
Allocating cases to the probable place of infection (or at least place of residence), and not to the place where the person is being treated.