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粪隐血试验作为结肠直肠癌的一项普查试验已被广泛应用，然而，其作用仍有所争议，需要建立更为可靠的结肠、直肠癌检测标记物。促衰变因子（DAF）是一种细胞膜结合糖蛋白，广泛存在于各种组织和细胞中。应用酶联免疫吸附试验（ELISA）测定粪便中DAF含量．是结肠、直肠癌检测的
The fecal occult blood test has been widely used as a screening test for colorectal cancer. However, its role is still controversial and it is necessary to establish a more reliable detection marker for colon and rectal cancer. Decay Factor (DAF) is a cell membrane-bound glycoprotein that is widely present in various tissues and cells. The DAF content in feces was measured by enzyme-linked immunosorbent assay (ELISA). Colon, rectal cancer detection