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梨形四膜虫为单细胞动物,属原生动物门、纤毛虫纲,膜口目,四膜科。广泛分布于世界各种水域,具备动物真核细胞的基本结构,营养、呼吸、排泄、生殖也接近高等哺乳动物细胞。在国外已成为检测和评价毒性物质、营养物质、抗菌药物、抗癌药物及致癌物质等较常用的试验动物。四膜虫可在人工培养液中生长,由于虫体较大(一般长50μm,宽30μm)故可在实体显微镜下用微细吸管单
Tetrahymena tetrapod is a single-celled animal, is a protozoan door, ciliate Gang, Membrane mouth, four membrane family. Widely distributed in various waters of the world, with the basic structure of animal eukaryotes, nutrition, breathing, excretion, reproduction is also close to higher mammalian cells. In foreign countries has become a testing and evaluation of toxic substances, nutrients, antimicrobial drugs, anti-cancer drugs and carcinogens and other more commonly used test animals. Tetrahymena can be grown in artificial culture solution, due to larger parasites (usually 50μm long, 30μm wide) it can be used under a microscope with a single micropipette