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【单选题】
男，25岁。一前右足底被铁钉刺伤，未作处理。近日，感头痛、咬肌紧张酸胀，诊断为破伤风，其发病机制中错误的是
A.
破伤风杆菌产生的内毒素引起症状
B.
痉挛毒素是引起症状的主要毒素
C.
溶血毒素引起组织局部坏死和心肌损害
D.
破伤风是一种毒血症
E.
毒素也可影响交感神经
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