问题
单项选择题 A1/A2型题
伤寒杆菌的主要致病因素为（）
A.肠毒素
B.内毒素
C.侵袭力
D.H抗原
E.神经毒素
答案
参考答案：B
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伤寒杆菌的主要致病因素为（）
A.肠毒素
B.内毒素
C.侵袭力
D.H抗原
E.神经毒素
参考答案：B
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