This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra & Penis, Subject name: Surgery
Urinary tract infection exists when the bacterial count in 1 ml. midstream specimen of urine is: 
Select and explain. 
A. 100, B. 1000, C. 104, D. 105 or over
D: 105 or over
Answer: D: 105 or over 
Explanation: Ans. (d) 105or overRef: Smith 17th Edition, Page 196* >105 colony forming unit is used to exclude contamination.* 80% of UTI are due to E. Coli.* UTI caused by Staphylococcus are due to Hematogenous spread.* In Children MC cause - Klebsiella and Enterobacter species.* The most reliable Urine specimen is obtained by Supra Pubic Aspiration