Caley J
Z Parasitenkd. 1975 Oct 16;47(3):217-35. doi: 10.1007/BF00418205.
Studies of the cysticercoids of Hymenolepis nana from insects and from mouse villi revealed important differences in cyst structure and function. The insect form resists low pH unless treated with bile salts which render the cyst permeable and reduce infectivity to mice. Bile salts are not essential for scolex activation. Activation is inhibited by pH 2.5 and under and by 1% succinic acid up to pH 4.0. The importance of scolex immobility and energy conservation in relation to cyst impermeability is discussed. The villus cysticercoid has no special insulating layer. It is vulnerable to low pH and cannot infect mice orally. Bile salts are without effect and excystment occurs unaided by external agents. The structural differences between the two forms revealed by the electron microscope may be attributed to changes in the relative rates of development of the various tissues.
对来自昆虫和小鼠绒毛的微小膜壳绦虫囊尾蚴的研究揭示了囊肿结构和功能的重要差异。昆虫形态的囊尾蚴能抵抗低pH值，除非用胆汁盐处理，胆汁盐会使囊肿具有渗透性并降低对小鼠的感染力。胆汁盐对头节激活并非必不可少。pH值在2.5及以下以及pH值高达4.0的1%琥珀酸会抑制激活。讨论了头节不动性和能量守恒与囊肿不渗透性的关系。绒毛囊尾蚴没有特殊的绝缘层。它易受低pH值影响，不能经口感染小鼠。胆汁盐没有作用，脱囊过程无需外部因素协助即可发生。电子显微镜揭示的两种形态之间的结构差异可能归因于各种组织相对发育速率的变化。
