Urethral discharge can be classified as mucus, bloody, or purulent according to its nature. The mucus discharge from the urethral orifice is milky white and thick, seen in sexual excitement and chronic prostatitis. Urethral orifice purulent discharge is yellow and sticky, commonly seen in acute urethritis. Bloody discharge from the urethral orifice, referring to blood mixed with mucus, is mostly seen due to urethral and genital tract infections. The diagnosis of mucinuria can be based on history and bacteriological examination. Centrifugal urine leukocytes 5/HP, urinary leukocyte excretion rate 200,000 to 400,000/h is suspicious, and 400,000/h is diagnostic. Urine colony count of 10,000 to 100,000/ml is suspicious for women, diagnostic for men, and 100,000/ml is diagnostic. ACB, Ubeta;2m, and urinary lysozyme assay help to differentiate between upper and lower urinary tract infections. x-ray and ultrasound also help to diagnose. The significance of urine culture test is to monitor whether the human urinary system (including kidney, bladder and urethra) is healthy and sterile. If there is a bacterial infection an antibiotic sensitivity test should be made for this bacteria so that the doctor can be guided to use antibiotics accurately and accurately to kill the bacteria early and return you to a healthy urinary system. The significance of urine culture test is to monitor whether the human urinary system (including kidney, bladder and urethra) is healthy and sterile. <1×105 colonies/L: Contaminated urine. <1×105-<1×106 colonies/L: Suspected urinary tract infection. >1×106 colonies/L: urinary tract infection. Bacterial culture count of middle urine Note: 1, wash the vulva before urine retention, the container used should be clean and free of contamination, not mixed with detergents, disinfectants and antiseptics and other chemicals to avoid affecting the test results. 2, urine retention should be sent immediately after the test to avoid incorrect test results after the urine is placed. 3, using the middle urine culture colony count of 1000 or less (<1000/mL), mostly in vitro infection. 4.If antimicrobial agents or diuretics have been used, etc., they should be promptly reflected to the doctor. 5, the collection of urine specimens should be strictly aseptic: generally take the middle section of urine. In female patients, the vulva should be washed with soap and water, then washed with sterile water, dried with sterile gauze, let the patient urinate, discard the anterior segment of urine, the middle segment of urine will be retained in a sterile container, the volume of urine is about 10mL. In male patients, the urethra should be washed with soap and water, then rinsed with water, the prepuce should be opened and rinsed, and then the middle segment of urine should be collected. Infants Xu clean and sterilize the pubic area, align the sterile vial mouth to the urethra with adhesive tape to fix, wait for the urine specimen and send it for examination. 6, bacterial culture and drug sensitivity test should be performed together.