The fine structure of intra-erythrocytic stages of Babesia bigemina.
The fine structure of intra-erythrocytic stages of Babesia bigemina.
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二联巴贝虫红细胞内阶段的精细结构。
DOI：
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发表时间：
1977
影响因子：
2.7
通讯作者：
H. Els
中科院分区：
文献类型：
--
作者：
F. Potgieter;H. Els
用电镜观察裂殖子的结构、裂殖子向滋养体转化过程中的结构、滋养体的结构以及B的增殖方法。二联。裂殖子呈梨形，由3层外膜包围，其中2层内膜常呈单一的嗜锇性结构（内膜）。前、后极环、微管、微丝、棒状体和线粒体有或无管嵴。大多数成熟裂殖子中存在单个大的不明球形体。裂殖子穿透红细胞后，通过一个转化过程发育成滋养体，该过程涉及表膜内膜、棒状体、大部分微丝和球体的丢失。滋养体被一层膜所包围，形状多形，含有大量的宿主细胞质内含物，但没有细胞孔或食物泡。生殖通过类似于胚胎生殖的过程发生，导致产生2个裂殖子，原始滋养体（母细胞）的细胞质成分在该过程中几乎完全并入子细胞。没有寄生虫被包含在寄生泡。
The electron microscope was used to study the structure of merozoites, merozoites in the process of transformation to trophozoites, trophozoites, and the method of multiplication of B. bigemina. The merozoites were piriform in shape and surrounded by 3 peripheral membranes of which the 2 inner ones often appeared as a single thick osmiophilic structure (inner membrane). Anterior and posterior polar rings, microtubules, micronemes, rhoptries and mitochondria with and without tubular cristae were discernible. A single large unidentified spherical body was present in most of the mature merozoites. After penetration of an erythrocyte, merozoites developed into trophozoites through a transformation process which involved the loss of the inner membrane of the pellicle, rhoptries, most of the micronemes and the spherical body. The trophozoites were surrounded by a single membrane, were pleomorphic in shape and contained large inclusions of host cell cytoplasm, but no cytostomes or food vacuoles could be identified. Reproduction took place through a process resembling schizogony resulting in the production of 2 merozoites, the cytoplasmic constituents of the original trophozoite (mother cell) being virtually entirely incorporated into the daughter cells in the process. None of the parasites were contained in parasitophorous vacuoles.