贾第鞭毛虫(Giardia,简称贾第虫)是一类分布遍及全世界,寄生于多种脊椎动物肠道内的原虫。研究表明,本属某些虫种对人或动物确有致病能力。寄生在人小肠内的蓝氏贾第鞭毛虫(Giardia lamblia)可引起以腹泻为主要特征的贾第鞭毛虫病(Giardiasis),并可因长期腹泻而导致儿童营养吸收障碍及发育不良。本病的危害性正日益受到人们的重视。对贾第虫病的深入研究,有赖于其动物模型的建立。贾第虫种别甚多,已知者达40 Giardia (Giardia, referred to as Giardia) is a distributed throughout the world, parasites in a variety of vertebrate intestinal tract of protozoa. Studies have shown that some species of this genus have indeed human or animal pathogenic ability. Giardia lamblia parasitic in the human small intestine can cause Giardiasis, a predominant diarrhea, and can lead to childhood nutritional disorders and stunting due to chronic diarrhea. The dangers of this disease are increasingly valued by people. In-depth study of giardiasis depends on the establishment of its animal model. Giardia species is very large, 40 known