If a urinary tract infection is present, abnormal indicators may appear when performing a routine urine examination, including: 1. An increase in the number of white blood cells in the urine, or a result that shows a positive white blood cell ratio. If a quantitative examination is performed, the number of leukocytes in the urine exceeds ten per high-powered field of view, and if a qualitative examination is performed, the result is positive. 2. The number of bacteria in the urine increases significantly, usually the number of bacteria in the urine does not exceed 2,500, and if a urine sediment examination is performed for the presence of infection, the number of bacteria is often >2,500. 3. Nitrite in the urine is normally negative, but if there is The urine is normally negative for nitrite, but if there is an infection with Escherichia coli, it can be positive for nitrite. 4, positive for leukocyte esterase, when there is a urinary tract infection, there can be abnormal indicators of leukocyte esterase being positive. 5, routine urine examination, from the appearance, character, can be manifested as cloudy urine or fishy odor, which also indicates the possible presence of infection.