问题 单项选择题

与葡萄球菌感染易于局限化有关的因素是

A.SPA

B.肠毒素

C.血浆凝固酶

D.杀白细胞素

E.表皮剥脱毒素

答案

参考答案:C

解析:[解题思路] 凝固酶是金黄色葡萄球菌的主要致病因素,与感染局限化、形成血栓、脓汁黏稠等有关。肠毒素与食物中毒有关。表皮剥脱毒素可引起烫伤样皮肤综合征。葡萄球菌A蛋白(SPA)与 IgG的Fc段结合,具有抗吞噬、引起超敏反应等作用。[命题规律] 考察“金。黄色葡萄球菌的致病物质”。必须掌握。

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单项选择题