Abstract
Visceral leishmaniasis (VL) is a neglected tropical disease caused by infection with the protozoan Leishmania infantum, transmitted by sandflies (Diptera:Psychodidae). It mainly affects children and the elderly and can be fatal if left untreated. VL is a major public health problem in Brazil, and in the state of São Paulo it is in a process of geographical expansion, due to a variety of f…