Current W L, Janovy J
J Parasitol. 1976 Dec;62(6):975-81.
Ultrastructural aspects of interlamellar Henneguya exilis infections in channel catfish are reported. The plasmodium wall of this form differs from that of other species in that it is composed of two outer unit membranes which give rise to a zone of numerous pinocytic canals. Single-membraned canals appeared to be a stable feature of the wall while double-membraned canals are interpreted as those actively carrying out pinocytosis. Evidence suggests that host cellular cytoplasm as well as interstitial material is taken in by plasmodia. Plasmodium wall integrity, aggregation of parasite ectoplasmic components, numbers of pinocytic canals, and number of mitochondria proximal to the wall vary among different plasmodium profiles and may be related to plasmodium maturity. The parasite causes extensive hyperplasia of basal cells, which in turn replaces most other cell types found in noninfected gill filaments. Cytoarchitectural differences between basal cells of noninfected filaments and basal cells adjacent to plasmodia include significantly shorter microfilament bundles in the latter.
报道了斑点叉尾鮰中纤细亨内吸虫层间感染的超微结构特征。这种形态的疟原虫壁与其他物种不同，它由两层外部单位膜组成，这两层膜形成了一个有许多胞饮管的区域。单膜管似乎是壁的一个稳定特征，而双膜管被解释为积极进行胞饮作用的管。有证据表明，疟原虫摄取宿主细胞的细胞质以及间质物质。疟原虫壁的完整性、寄生虫外质成分的聚集、胞饮管的数量以及壁附近线粒体的数量在不同的疟原虫形态中有所不同，并且可能与疟原虫的成熟度有关。该寄生虫导致基底细胞广泛增生，进而取代了未感染鳃丝中发现的大多数其他细胞类型。未感染鳃丝的基底细胞与疟原虫相邻的基底细胞之间的细胞结构差异包括后者的微丝束明显更短。
