RESUMO
A study of Plasmodium vinckei peterri sporogony was performed by experimental infection of Anopheles stephensi with gametocytes from infected mice. The study includes the description of the ookinete, complete evolution of oocysts and their final transformation to sporozoites. These were later used for intravenous infection of new mice, in order to study the exoerythrocytic schizogony. The morphology of exoerythrocytic schizonts was similar to that of other species of the same group. The minimal duration of the hepatic cycle was found to be of 61 hours. These data, along with other related to the hematic cycle characteristics, help to complete the information on the species, which can be recommended as a model for the study of human malaria.