椎实螺是肝片吸虫的中间宿主,在其体内,肝片吸虫先后经历胞蚴、雷蚴、尾蚴三个阶段,雷蚴至少有三代。由于在椎实螺体内尚发现有其他吸虫的幼虫期,因此,对螺体内肝片吸虫的雷蚴及雷蚴代尤其是第一代雷蚴(Rla)的鉴定描述是非常必要的。本实验采用形态和体毛序测定,对不同的雷蚴代进行了描述,方法及结果如下。 在法国中部两个地区采集未受任何吸虫感染的椎实螺两个种群:Saint Ours种群和Thenay种群,以Saint Ours种群作为第一组 The spinella is the intermediate host of Fasciola hepatica, and in its body, Fasciola hepatica has experienced three stages: cercaria, erythraea and cercariae. Erythrocytes have at least three generations. Because of the presence of other juvenile stage larvae in the genus Constella, it is necessary to characterize the echinococcosis and the larvae, especially the first generation of Rla, in the snail. In this experiment, morphology and body hair sequence determination of different generations of larvae were described, methods and results are as follows. Two populations of M. przewalskii without any fluke infestation were collected in two areas of central France: the Saint Ours population and the Thenay population, with the Saint Ours population as the first group