3 research outputs found

    Study on the life history of Exorchis mupinensis sp. nov. and the survey of other larvae of trematodes parasiting in Oncomelania hupensis Gredler in western Dongting lake

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    本论文包括两个部分: 1.西洞庭湖目平外睾吸虫新种生活史研究 外睾类吸虫幼虫是可以生物控制钉螺体内血吸虫幼虫的良好材料。作者从2006年12月至2007年11月,在湖南汉寿目平湖对外睾类吸虫的资源进行了3次野外调查,发现外睾类吸虫是西洞庭湖鲶鱼(Parasilurusasotu)肠道极为常见的寄生虫。这些外睾类吸虫中分为三种不同形状(梨形、瓜子形和椭圆形)、两种不同排泄囊(倒三角形短主干Y、V)。为了确定西洞庭湖的外睾类吸虫种类并为后续的分子生物学研究提供清晰的背景,结合成虫形态的描述,进行了外睾类吸虫幼虫在中间宿主体内的发育生物学比较研究。实验结果表明,目平湖区的外睾吸虫与在我国已报道的...There are two parts in the paper: 1.The life history of Exorchis mupinensis sp.nov. in western Dongting lake Exorchis spp.is a very good material for biological control to Schistosoma japonicum . Surveies of field resource of Exorchis spp. was carried out three times from December 2006 to November 2007 in Hanshou, Hunan province. Exorchis spp.was found to be a very prevalence parasite in th...学位:理学博士院系专业:生命科学学院生物学系_动物学学号:2162007015380

    湖南目平湖钉螺血吸虫病原生物控制资源调查及感染试验

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    目的虽然一种贝类可作数种吸虫的中间宿主,但在各吸虫种类都存在的一自然环境中,它们共同贝类宿主的一个体通常只携带一种吸虫幼虫期。作者利用这一规律在湖南汉寿目平湖血吸虫病区进行媒介钉螺的调查,查到钉螺感染有日本血吸虫(Schistosoma japonicum)、外睾类吸虫(Exorchis)、斜睾类吸虫(Plagiorchis)、侧殖类吸虫(Asymphylodora)和背孔类吸虫(Notocotylus)5种吸虫的幼虫期。其中对生物控制媒介钉螺有利用价值的外睾类吸虫,其钉螺感染率为3.298%(96/2911),终宿主鲶鱼(Parasilurus asoyus)的感染率为99.31%(434/437)、平均每尾鲶鱼的感染强度为115.4条。先用外睾类吸虫虫卵感染钉螺后再感染日本血吸虫毛蚴,切片观察不同时间的实验螺,后侵入的血吸虫幼虫,全部受损害不能发育

    Discovery and identification of Exorchis mupingensis sp.nov.

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    目平外睾吸虫EXOrCHIS MuPIngEnSIS SP.nOV.的成虫寄生在西洞庭湖区目平湖的鲶鱼PArASIluruS ASOTuS肠道内;其第一中间宿主为湖北钉螺OnCOMElAnIA HuPEnSIS,第二中间宿主为金鱼CArASSIuS AurATu;其生活史包括成虫、尾蚴、一代雷蚴、囊蚴及后蚴和童虫;本吸虫的排泄囊在童虫和成虫均为不典型的V形,即包括V形和倒三角形短主干y形,与已经报道的其它外睾吸虫的排泄囊形态有显著的不同,此外本吸虫在成虫和幼虫期同已报告的其他外睾吸虫也存在明显的差异。The adult of Exorchis mupingensis sp.nov.were obtained from the intestine of Parasilurus asotus occurring in Muping Lake of western Dongting Lake area.Its first intermediate host is Oncomelania hupensis,and the second intermediate host is Carassius auratu.Its life cycle comprises:adult,cercaria,one generation redia,metacercaria,excysted metacercaria,and adolescaria.The excretory bladders of the adult and adolescaria of the adult are nontypical v-shaped,namely comprising v-shpaed excretory bladders and y-shpaed excretory bladders with inverted triangle short main trunk,which is different from the morphological structure of other reported Exorchis spp.,and the adult and the larva have other obvious diffenences from other Exorchis spp.which have been already reported
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