Abstract: To compare the effects of sera on the growth of Plasmodium berghei, the erythrocytic stages were cultured with rat serum, human umbilical cord serum, human B-type serum, rabbit serum, calf serum and calf serum with hypoxanthine respectively. The topography of the erythrocyte and parasite cultured with calf serum were observed before and 12, 20 and 28 hours after cultivation. All of the sera used did not effectively improve the long-term culture of P. berghei, regardless of some differences in short-term cultures. Under SEM, erythrocytes agglutinated with each other and the surface adhesive materials on the erythrocytes and parasites agglomerated gradually with the cultivation time. The results suggested that the surface adhesive materials were correlated with the destruction of erythrocytes, malnutrition of the parasites and blockade of merozoite reinvasion (Figs. 1-16).