清洁中段尿细菌培养革兰阴性杆菌大于多少菌落计数为有意义

清洁中段尿细菌培养革兰阴性杆菌大于多少菌落计数为有意义

A.102/ml

B.103/ml

C.104/ml

D.105/ml

E.106/ml

正确答案是D