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扫描电镜观察包囊呈椭圆形,9～10×6～7μm大小,囊壁表面凹凸不平。冷冻蚀刻复型法:将包囊壁劈开,显示囊壁为十余层膜结构,各层复型膜表面尚光滑。透射电镜见囊壁厚0.16～0.29μm,其表面凹凸不平,囊壁与滋养体间的空隙内可见横纵切的鞭毛结构。囊内虫体的外界膜下有呈单层排列的空泡结构,细胞质内有两种大小不同的颗粒,近虫体的一端有两个泡状细胞核,基体位于两个细胞核前极之间近中线处,伸出前、后侧和尾鞭毛。平行排列的微管伴有垂直的带状结构,分散在细胞质内。
Scanning electron microscopy showed cysts oval, 9 ~ 10 × 6 ~ 7μm size, uneven surface of the capsule wall. Frozen etching complex method: the cyst wall cleavage, showing that the capsule wall is more than ten layers of membrane structure, the surface of the multi-layer membrane is still smooth. Transmission electron microscope see the wall thickness of 0.16 ~ 0.29μm, the surface uneven, wall and trophozoites can be seen within the gap between the longitudinal slitting flagellum structure. There are two types of vacuoles in the cytoplasm, which are different in size. There are two vesicular nuclei near one end of the parasite, and the matrix is located near the front of two nuclei Midline, extending out front, rear and tail flagella. Parallel arrangement of microtubules accompanied by a vertical ribbon structure, scattered in the cytoplasm.