[单选题]

李女士,28岁,因高热、腰痛、尿频、尿急来医院门诊,诊断为肾盂肾炎,中段尿培养的阳性标准是菌落计数大于

A.103/ml

B.104/ml

C.106/ml

D.105/ml

E.107/ml

参考答案与解析: