【摘要】 弓形虫速殖子呈半月形或香蕉形,虫体表膜分两层。前端有极环和类锥体:极环由内膜增厚形成,类锥体则是一中空的圆锥状结构,它由斜向走行而排列整齐的纤丝组成。22根膜下微管起始于极环而分布至虫体后端。棒状体从类锥体向后延伸至核前沿,其切面呈腺体样结构.棒状体可能具分泌功能.类锥体则与虫体侵入宿主细胞有关。更多还原

【Abstract】 Toxoplasma gondii tachyzoite was crescent-shaped. The pellicle of the parasite consisted of two membranes. The anterior end contained the polar ring and conoid, the former being the thickened inner membrane and the latter a cylindrical organelle which was made up of about 10 filaments arranged in an oblique row. The subpelli-cular microtubules numbering 22 originated at the polar ring and extended to the posterior end. The rhoptries extended from the conoid and terminated anterior to the nucleus with a narrow dense neck and an enlarged posterior portion with a glandulat structure. The rhoptries perhaps had a secretory function and the conoid might be related to the invasion of the tachyzoite into the host cell.更多还原