摘要： Exoerythrocytic stage: At the 7th day after sporozoite inoculation, the intactschizonts generally appear irregular in outline; some of them may be lobed and somemay contain 1-4 vacuoles 4-6 microns in diameter; its peripheral nuclei arrange atrandom, maturing at the 8th day. The parasitemia may appear at the 8th day. The