我国牛羊双腔类吸虫的继续研究:Ⅲ.三种双腔吸虫后蚴在异常昆虫宿主蚂蚁体内的发育

FURTHER STUSIES ON THE DICROCOELIUM FROM SHEEP AND CATTLE IN CHINA: Ⅲ . DEVELOPMENT OF THREE SPECIES OF DICROCOELID METACERCARIAE IN THEIR UNUSUAL ANT HOSTS

内蒙科尔沁草原的中华双腔吸虫(Dicrocoelium chinensis Tang et Tang,1978)其第二中间宿主是黑玉蚂蚁(Formica gagates),而山东滨州地区的矛形双腔吸虫(D.lanceatum Rud.,1803)和枝双腔吸虫(D.dendriticum Rud.,1819)的蚂蚁宿主是中华蚂蚁(Formica sinica)。作者用中华双腔吸虫的黏球感染山东的中华蚂蚁,同时用矛形双腔和枝双腔的黏球分别感染内蒙的黑玉蚂蚁。本文报道此试验中不同蚂蚁种类和各虫种后蚴间所产生的不同反应情况,及矛形双腔和枝双腔在后蚴各发育期的形态差异。

Formica gagates serves as the ant host (second intermediate host) of Dicrocoelium chinensis in the Koersin Pasture of Eastern Inner Mongolia Autonomous Region, where D. lanceatum and D. dendriticum have not been found, while Formica sinica serves as the ant host of D. lanceatum and D .dendriticum in the Binzhou District of Shandong Province, where D. chinensis has not occurred.The present communication reports the results of several experiments which were performed to infect Formica gagates and Formica sinica by feeding them with fresh slime balls of D. lanceatum, D. dendriticum and D. chinensis, respectively. It is shown that host-specificities did occur in the ant species to the slime balls and metacercariae of different species of Dicrocoelium . The viable rates of metacercariae in unusual ant hosts are sharply lower than that in usual ant host.Comparative observations were made in detail on the metacercarial morphologies of D. lanceatum and D. dendriticum during different developing periods. The elucidation of these metacercariae comfirms further the independent status of the two dicrocoelid species.