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【单选题】
肥达反应有诊断价值的抗体效价,通常是
A.
O凝集价≥1:40,H凝集价≥1:40
B.
O凝集价≥1:80,H凝集价≥1:160
C.
O凝集价≥1:40,H凝集价≥1:160
D.
O凝集价≥1:160,H凝集价≥1:80
E.
O凝集价≥1:80,H凝集价≥1:80
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B.
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D.
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C.
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D.
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