Schramlová J, Blazek K
Folia Parasitol (Praha). 1983;30(4):335-9.
On day 14 p.i., C. bovis is a spherical formation without cavity (in neonatally infected calves, the cavity already starts to form). On day 21 p.i., a conical anlage of the scolex is formed and on day 23 p.i., it bears a conspicuous invagination of the tegument. On day 28 p.i., the scolex with spiral canal, sucker anlages and single calcareous bodies is developed. On day 42 p.i., the suckers are fully differentiated and the calcareous bodies in scolex parenchyma are distributed up to below the level of suckers. On day 55 p.i., the calcareous bodies are present in the morphologically differentiated scolex even below the suckers. The authors assume that at that time the larva is already infective and if its infectivity is assessed on the basis of morphological criteria, the presence, number and distribution of calcareous bodies should be considered.
感染后第14天，牛带绦虫为无腔的球形结构（在新生感染的犊牛中，腔已开始形成）。感染后第21天，形成了头节的圆锥形原基，感染后第23天，其体表有明显的内陷。感染后第28天，带有螺旋管、吸盘原基和单个钙质小体的头节发育完成。感染后第42天，吸盘完全分化，头节实质中的钙质小体分布至吸盘水平以下。感染后第55天，形态上已分化的头节中，即使在吸盘以下也有钙质小体。作者认为，此时幼虫已具有感染性，如果根据形态学标准评估其感染性，则应考虑钙质小体的存在、数量和分布情况。
