Table 2.

Rogerson criteria for histopathologic diagnosis of placental malaria

Active infection	Active-chronic infection	Past-chronic infection	Not infected
Presence of parasitized RBCs in the intervillous space with malaria pigment in RBCs and monocytes in the intervillous space; no pigment in fibrin	Pigment accumulation in fibrin, fibrin-containing cells, syncytiotrophoblasts, stroma accompanies the previous findings	Malaria pigment confined to fibrin or cells within fibrin in the absence of parasites	Absence of parasite in placental RBCs without malaria pigment

Data from Rogerson [15]