凝固酶阳性与凝固酶阴性葡萄球菌之间的传统区分方法是通过试管法凝固酶试验来检测胞外葡萄球菌凝固酶,或通过玻片法凝固酶试验来检测细菌细胞表面的凝集因子(结合凝固酶)。据报告,约 97% 的人类菌株同时具有结合凝固酶和细胞外葡萄球菌凝固酶。蛋白质 A 存在于约 95% 的人类菌株的细胞表面,并且具有结合免疫球蛋白 G (IgG)1 的 Fc 部分的能力。
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