This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': "A young lady presents with symptoms of Urinary Tract Infection. All of the following findings on a midstream urine sample suppo the diagnosis of 'Uncomplicated Acute Cystitis', EXCEPT: \nSelect and explain. \nA. Positive Nitrite Test, B. CFU count < 1000/ml, C. Detection of one bacteria / field on Gram stain, D. >10WBC/HPF", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lab Findings in Uncomplicated acute cystitis are: Urinalysis dipstick: pH>7, positive for leuckocyte esterase and nitrites. Microscopic exam: WBC> 2-5 WBC/HPF, bacteria, positive gram stain for cocci or rods, yeasts, and blood Urine culture and sensitivity: positive culture standard 105 CFU, symptomatic female - 102 & symptomatic males - 103 Ref: Family Practice Guidelines By Jill C. Cash, Cheryl A. Glass - Page 282', 'role': 'assistant'}]