凝固酶陽性與凝固酶陰性葡萄球菌之間的傳統(tǒng)區(qū)分方法是通過試管法凝固酶試驗(yàn)來檢測(cè)胞外葡萄球菌凝固酶,或通過玻片法凝固酶試驗(yàn)來檢測(cè)細(xì)菌細(xì)胞表面的凝集因子(結(jié)合凝固酶)。據(jù)報(bào)告,約 97% 的人類菌株同時(shí)具有結(jié)合凝固酶和細(xì)胞外葡萄球菌凝固酶。蛋白質(zhì) A 存在于約 95% 的人類菌株的細(xì)胞表面,并且具有結(jié)合免疫球蛋白 G (IgG)1 的 Fc 部分的能力。
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