【作者】 陈克强； 樊培方； 戴文宜； 徐俊美； 季玲妹；

【Author】 Chen Keqiang Dai Wenyi Fan Peifang Xu Junmei Ji Lingmei

【机构】 上海农学院动物科学系； 上海浦东新区畜牧兽医站； 华东师范大学生物系；

【摘要】 本文应用SEM和TEM对自然感染鸭的纤细背孔吸虫(Notocotylus attenuatus)成虫的体被进行了观察。发现虫体口吸盘无体棘,但基部具有乳突．虫体体棘有尖叶形和银杏叶形两种。虫体腹面除生殖孔前方一小段无体棘外均密布彼此相叠的体棘,但在背面,仅两侧边缘覆盖着与腹面相似,但排列稀疏的体棘。TEM显示背面无体棘,皮层外层呈半球状隆起,基质内均匀分布杆状、球形分泌颗粒,以及膜包围小体,线粒体少。腹面两侧皮层外层也呈半球状隆起,基质内含球形分泌颗粒和空泡体、线粒体,体棘位于体被基质的表层。腹腺基部的皮层皱褶明显增加,基质内含球形和杆状分泌颗粒,线粒体多见以及有膜圆形小体,有两种感受器。皮层细胞位于实质内,胞质多突起,核膜清晰,胞质内含分泌体、线粒体和内质网。在腹面除皮层细胞外,还含另一种细胞,核形不规则,胞质内含多量线粒体, 多数集中于核附近。更多还原

【Abstract】 The ultrastructure of tegument in Notocotylus attenuatus has been studied by means of Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). SEM showed that there are papilla on the base of the oral sucker. The ventral body surface of spineless region from the oral sucker to the genital pore apears like a stone paved street. The rest part of ventral surface is covered with two kinds of spines, one of which is ginko leaf-like in appearance and the other is narrow with a point apex. The whole marginal region of dorsal surface of the parasite is covered sparselly with spines with a point apex. TEM showed that the dorsal tegument surface is invaginated as semi balls, the cytoplasm of syncytium is filled with bar-or ball-shaped granules and vaculoes surrunded with membrane, but few mitochondria. The ventral tegumental surface is also invaginated as semi-balls, the syncytial cytoplasm is filled with spherical granules and vacuoles, mitochondria, and spine-like formations which are localized on the surface, not spreading to the basal membrane. The tegument of the papilla-like formations is similar in arrangement and structure to the layers of the main tegument but strongly invaginated. There are two types of sensory receptors and also spine-like processuses which are more tender here and less densely distributed. The tegument cells are localized in the parenchyma, the cytoplasm of which contains cytoplasmic processues, and secretory bodies, mitochondria and endoplasmic reticulum. The pear-like cells in the parenchyma under ventral tegument contains abundant mitochondria which often arranged concentically.更多还原