Urine culture Why keep midstream urine

Urine culture is a test method to detect whether there are pathogenic bacteria in urine. Urine culture takes midstream urine, which is to prevent contamination of the urethral meatus with bacteria, which will cause inaccurate detection. Prostatic fluid may be mixed in the latter urine, which will also affect the results. Therefore, it is necessary to take midstream urine for culture. And urine culture, morning urine is the best, because morning urine after a night of urine concentration, can more accurately detect whether there are pathogenic bacteria in the urine, whether there is abnormal urine.