本文从钉螺的产卵量、组织化学和超微病理学的角度阐述洞庭湖别、睾吸虫对其中间宿主-钉螺的影响。1材料和方法1．1钉螺来源来自湖南省华容县幸福牧场，均为bes旋成螺，长0．7-1．2cm，用单试管逸蚴法分离出外睾吸虫阳性钉螺（以下简称阳性钉螺），在显微镜下鉴别外睾吸虫尾坳 In this paper, from the angle of oviposition, histochemistry and ultrastructural pathology of Oncomelania hupensis, the effects of non-testis and testis in Dongting Lake on the intermediate host Snail were described. 1 Materials and methods 1.1 snails from Huarong County, Hunan Province, pasture happiness, are bes spiral snail, length 0.7-1.2cm, with a single test tube to escape metazoan suis testis-positive snails (hereinafter referred to as positive snails ), Under the microscope to identify the epididymis tail Au