在进行肺吸虫病实验研究时,常需用大量纯净囊蚴及后尾蚴,如肺吸虫异常感染方式的研究、囊蚴或后尾蚴抗原的研究等。此等研究工作的前提是需要较纯净的囊蚴或后尾蚴。目前常用的囊蚴提纯法,是将石蟹捣碎成糊状通过大约30目、40目的铜丝筛后,在放大镜下用滴管从滤液沉渣中逐个吸取囊蚴,效率较低。并且由于沉渣中含有许多碎蟹壳与蟹肉,故在吸取 In the experimental study of paragonimiasis, often require a large number of pure metacercariae and cercariae, such as paragonimiasis infection, metacercariae or cercariae antigen research. The premise of these studies is the need for more pure metacercaria or post-cercariae. The commonly used method for purification of metacercaria is to smash the stone crab into a paste through a copper mesh screen of about 30 meshes and a mesh of 40 mesh, and then use a dropper to absorb the metacercarids one by one from the filtrate sediment under a magnifying glass, which is inefficient. And due to sediment contains many broken crab shell and crab meat, so in the draw