六子疟原虫

Plasmodium hexamerium

The prcsent paper reports plasmodium hexamerium in the blood of wibe bisds in Hainan island,the bloods of three Anthus hod gsoni yunnanensis were examined.All stages could be seen in smears from these 3 birds.The dagnostic characterstic of various stages:the smallest trophozoite is usually comma form,it assume an irregular ring form with a small vacuole.Older tropho-zoite is sometimes elongated,throwing out irregular amoeboid pseudopod and small vacuole present.The schizonts was smaller than host cell nucleut;a mature schizont had a constant number of six merizoites.The cytoplasm almost colorless,and the pigment clumped to form a single granule.The gametocytes was elongate in form,almost from one pole of erythrocyte to the other.One end of the gametocyte appears larger and more roundec than the other end.The rounded end bended around the host cell nucleus.The cytoplasm of macrogametocyte is dark blue,and of microgametocyte is pale,its almost completely fills the place between the nucleus and the membrane of the host cell.