【摘要】 <正> 一、前言 牛羊胰脏吸虫病是我国各农牧区中常见而且危害严重的一种吸虫病,国内此吸虫病的病原主要有胰阔盘吸虫(Eurytrema pancreaticum(Janson)、腔阔盘吸虫(E.coelomaticum(Giard et Billet)及枝睾阔盘吸虫(E.cladorchis Chin,Li et Wei)三种,其中以胰阔盘吸虫的分布区最大。关于本类吸虫的生物学问题近年来经国内外蠕虫学者的探讨而逐渐被了解(唐仲璋,1950;唐仲璋、唐崇惕,1975、1977;Basch,1965;Ksembaeva,1967;1973等)。国内在福建已详细观察了腔阔盘吸虫和枝睾阔盘吸虫生活史全过程,并经试验证实了它们的贝类宿主及不同的昆虫宿主的种类。胰阔盘吸虫的生活史虽亦经阐明,但更多还原

【Abstract】 Under natural and experimental conditions,the different phases of the life cycle of this trematode were studied.In Heilongjiang,the molluscan host of E.pancreati-cum is Gancsella virgo (Pilsbry).On the Hugejiletu pasture in Huerle People’s Communes 159 of the land snails of the species Gancsdla virgo were collected and examined with 18 positives (10.65%),while in the environs of Erlongshan People’s Communes 189 and 1,485 of the same land snails were examined with 9 and 1 positives (4.5% and 0.6%) respectively.In the natural conditions of Jachiatc District of the Southwest Heilongjiang.the development of E.pancreaticum parthenitae in naturally infected Gancsdla virgo take place only from May to September,as temperature falls to 10℃ and below the development of parthenitae slows down and stops,to be resumed again 8-9 months later.The long-horned meadow grasshopper,Conoccphalus chinensis Redt.which had been discovered serving as the second intermediate host for E.pancreaticum in Russia (Dvoryadkin,1969;Nadikto,1973),was also the responsible insect host in Northeast China.It was examined with the incidence of infection 0.47-9.3%.Opinions concerning the identity of E.pancreaticum and E.coelomaticum do not concur among different helminthologists.In the present study comparisons of both larval forms and juvenile were made.On the basis of careful comparisons we concluded that E.coclomaticum has an independent status as a species.In our experiments,it,was found that during the morphogenesis of E,pancrea-ticum,many of the specimens not fully mature resemble those of E.ovis Tubangui,1925.We are,therefore,of the opinion that E.ovis is probably a synonym of E.pancreaticum更多还原