单项选择题

3、关于微生物的致病性，下列叙述哪项是错误的（）

A．微生物致病性是指微生物引起疾病的能力
B．致病能力强弱的程度称为毒力
C．致病性有种属特征
D．致病性有赖于细菌的侵袭力
E．微生物引发的疾病与人体的免疫力无关

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