单项选择题

A.伤寒沙门菌O抗原凝集效价≥1:80,H抗原凝集效价<1:160
B.伤寒沙门菌O抗原凝集效价≥1:80,H抗原凝集效价≥1:160
C.伤寒沙门菌O抗原凝集效价<1:80,H抗原凝集效价≥1:160
D.伤寒沙门菌O抗原凝集效价<1:80,H抗原凝集效价<1:160
E.O抗原凝集效价≥1:80,副伤寒甲沙门氏菌H抗原凝集效价≥1:80