Plasmodium ovale curtisi; Plasmodium ovale wallikeri; diagnosis; imported malaria; malaria; malaria-endemic countries; parasites. Root Cause of Disease Plasmodium ovale is one type of malaria. Plasmodium ovale is a species of parasitic protozoan that causes tertian malaria in humans. It is one of several species of Plasmodium parasites that infect humans, including Plasmodium falciparum and Plasmodium…