Kumazawa H, Suzuki N
Parasitology. 1983 Apr;86 (Pt 2):275-89. doi: 10.1017/s0031182000050447.
Growth of Hymenolepis nana in mice is analysed by identifying designated stages of proglottid maturation in the strobila, and by determining the numbers of proglottids between them and the posterior terminus of the worm, as a function of time after cysticercoid infection. The proglottid maturation rate was fairly constant between stage A (onset of the somatic primordium formation) and stage B (first appearance of sperms in the seminal vesicle), but gradually fell after stage B, during pre-patent development of the worm. The actual rate of proglottization during this period coincided well with that estimated from the number of proglottids between stages A and B on an assumption of a certain maturation rate. This procedure is extended to estimate the rates of proglottid formation and shedding during later development. It is deduced that the absolute rate of proglottization increases until day 12, gradually decreasing afterwards, and that from 2300 to 2800 proglottids are shed by day 20, until which from 4000 to 4500 proglottids have passed stage A. It is shown that the proportionate increase of the gravid region in older worms depends not only on a decrease in the rate of proglottization, but also on the prolonged period during which proglottids stay in the strobila.
通过识别链体中节片成熟的特定阶段，并确定它们与虫体后端之间节片的数量，作为囊尾蚴感染后时间的函数，来分析小鼠体内微小膜壳绦虫的生长情况。在阶段A（体原基形成开始）和阶段B（精囊内首次出现精子）之间，节片成熟率相当恒定，但在阶段B之后，在虫体潜隐期发育期间逐渐下降。在此期间实际的节片形成率与根据阶段A和B之间节片数量并假设一定成熟率估算出的节片形成率非常吻合。该方法被扩展用于估算后期发育过程中节片形成和脱落的速率。据推断，节片形成的绝对速率在第12天之前增加，之后逐渐降低，到第20天有2300至2800个节片脱落，到此时有4000至4500个节片已通过阶段A。结果表明，老年虫体中孕节区的比例增加不仅取决于节片形成速率的降低，还取决于节片在链体中停留时间的延长。
