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患者女性,45岁。右肾结石病史5年,三天前突发高热,寒战,感全身不适,腰痛,并有尿频,尿急及排尿疼痛,查体:T 39℃,右脊肋区压痛及叩击痛,尿检:外观混浊,RBC:8/HP,WBC:30/HP,临床诊断为急性肾盂肾炎。若进行清洁中段尿培养请问具有尿路感染诊断意义的细菌数为()
A.>103/ml
B.>104/ml
C.104~105/ml
D.<105/ml
E.>105/ml
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E、>105/ml
解析:本题考查尿培养标本菌落计数的临床评价由于正常人尿道及会阴尿道开口处本身即存在一定量细菌定居因此只有在尿培养标本菌落计数>105/ML时才具有尿路感染诊断意义
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