<prompt> Amastigote form is seen in -MacrophagesRES reticulo-endothelial cellsLymphocytesRBC  <response>: The species of leishmania exist in two forms:-1. amastigote aflagellar 2.promastigote flagellated in their life cycle. Amastigote Non-flagellate form occurs in the infected lesion of man in reticuloendothelial cells like macrophages, neutrophils, endothelial cells of liver, spleen, bone marrow, etc. Amastigote form also called as LD body. It is an obligate intracellular form and infective to sand-fly. Promastigote form is an extracellular form and infective to humans. It is mainly found in sandfly and in culture. Leishmania donovani Promastigotes in culture fluid Leishmania donovani LD bodies - Amastigote form in Bone marrow 