摘要
采用纯种微小泰泽球虫Tyzzeria Parvula卵囊,人工感染四日龄雏鹅,定时剖杀,取肠道组织进行超薄切片,在透射电镜下观察微小泰泽球虫裂殖生殖阶段虫体的超微结构。结果表明。滋养体和裂殖体均在带虫空泡内发育。滋养体在发育过程中向带虫空泡内挤出含有微线、棒状体、膜下微管等胞器的细胞质团。在滋养体的被膜空泡内观察到了退化的微线。多核体和正在进行出芽生殖的裂殖体内散布有微线。裂殖子的形成方式为外出芽生殖。成熟的第二代裂殖子具有复顶亚门虫体的基本结构。
The ultrastructural changes of Tyzzetia Parvula which occurred during schizogony in the small intestine of youag domestic geese are described.The trophozoites and meronts developed within parasnophorous vacuoles.Degeneration of microneme-like structure within membrane-bounded vesicles was occasionally observed in the developing trophozoites.It was also observed that a portion of cytoplasm containing organelles such as micronemes,rhopt-rles,subpellicular microtubules was extruded into the parasitophorous vacuole from the surface of trophozoites.These may be considered as the two methods of eliminating certain Organelles present in the motile stages.The second generation merozoites averaged 4.30×0.84μ in size and possessed a nucleus,apical complex,rhoptries,micronemes,mitochondria,endoplasmic reticulum and other organelles.The merozcites formed by exogenesis as in the majority of the Eimeria.
出处
《华南农业大学学报》
CAS
CSCD
1989年第4期79-84,共6页
Journal of South China Agricultural University
关键词
微小泰泽球虫
裂殖子
超微结构
Tyzzsria porvula
Trophozoite
Merozoite
Ultrastructure
