Method Ku antigen was extracted from rabbit thymus and was used to detect Ku Ab in the sera of 50 normal controls and 438 CTD patients by double immunodiffusion.

• 方法 制备兔胸腺丙酮粉 ,提取Ku抗原 ,以免疫双扩散法测定 5 0份正常人和 438份不同CTD患者血清中Ku抗体阳性率 ,分析Ku抗体阳性患者的临床和实验室特点。