瘤拟黑螺作为日本棘隙吸虫第一中间宿主的发现

THE DISCOVERY OF MELANOIDES TVBERCULATA AS THE FIRST INTERMEDIATE HOST OF ECHINOCH ASMUS JAPONICUS

在福建云霄,诏安县采检的瘤拟黑螺体内,发现一种具棘口吸虫特征的尾蚴,人工实验感染第二中间宿主淡水鱼后3～4h,在鱼鳃内形成囊蚴。将囊蚴分别感染金黄色地鼠和鸽子后获得日本棘隙吸虫成虫。首次报告瘤拟黑螺充当日本棘隙吸虫第一中间宿主,其尾蚴自然感染率为1.1％;同时对尾蚴形态特征作了描述。

This paper reports on the discovery of cercariae which are similar to those of Echino-tomatidae in Melanoides tuberculata in Yunxiao and Zhaoan Counties of Fujian. Encysted metacercariae were found in the gills of fresh-water fish after experimental infection with the cercariae for 3 to 4 hours. Adult worms identified as Echinochasmus japonicus were obtained front Mesocricetus auratus and dove after infection with the metacercariae. Melanoides tuberculata was recorded for the first time as the first intermediate host of E. japonicus and its natural infection rate was found to be 1.1%. The morphological characteristics of the cercaria are described.