Abstract：
Trematodes of the order Diplostomida are well known as serious pathogens of man, and both farm and wild animals; members of the genus Schistosoma (Schistosomatidae) are responsible for human schistosomosis (schistosomiasis) affecting more than 200 million people in tropical and subtropical countries, and infections of mammals and birds by animal schistosomes are of great veterinary importance. The order Diplostomida is also rich in species parasitizing other major taxa of vertebrates. The \"Aporocotylidae\" sensu lato are pathogenic in fish, \"Spirorchiidae\" sensu lato in reptiles. All these flukes have two-host life cycles, with asexually reproducing larvae usually in mollusks and occasionally in annelids, and adults usually live in the blood vessels of their vertebrate hosts. Pathology is frequently associated with inflammatory reactions to eggs trapped in various tissues/organs. On the other hand, the representatives of Diplostomidae and Strigeidae have three- or four-host life cycles in which vertebrates often serve not only as definitive but also as intermediate or paratenic hosts. Pathology is usually associated with migration of metacercariae and mesocercariae within the host tissues. The impact of these trematode infections on both farm and wild animals may be significant.
摘要：
众所周知，二倍体目的吸虫是人类的严重病原体，以及农场和野生动物；血吸虫属（血吸虫科）的成员负责人类血吸虫病（血吸虫病），影响热带和亚热带国家的2亿多人，动物血吸虫对哺乳动物和鸟类的感染具有重要的兽医学意义。Diplostomida也富含寄生于其他主要脊椎动物类群的物种。“孢子虫”在鱼类中具有致病性，爬行动物中的“螺旋藻科”。所有这些吸虫都有两个宿主生命周期，无性繁殖的幼虫通常在软体动物中，偶尔在环节动物中，成年人通常生活在脊椎动物宿主的血管中。病理学通常与对被困在各种组织/器官中的卵的炎症反应有关。另一方面,Diplostomidae和Strigeidae的代表具有三个或四个宿主的生命周期，其中脊椎动物通常不仅用作确定宿主，而且还用作中间宿主或副宿主。病理学通常与宿主组织内的尾蚴和中尾蚴的迁移有关。这些吸虫感染对农场和野生动物的影响可能是显著的。
