肝片吸虫普遍寄生于反刍动物,其排泄分泌抗原的免疫特性和生物学特性,已有相关研究。从原核生物到哺乳类,生物体普遍具有抗氧化防御机制,包括分解过氧化物和超氧阴离子的酶类以及络合金属阳离子的化合物,其水平高低可能与某些寄生吸虫的感 Fasciola hepatica parasitic on ruminants in general, its excretion of antigens immune characteristics and biological characteristics, has been related research. From prokaryotes to mammals, organisms generally have antioxidant defense mechanisms, including enzymes that break down peroxides and superoxide anion, as well as compounds that complex metal cations, at levels that may be related to those of some parasitic flukes