A urine culture is a method of detecting bacteria or yeast in the urine that might cause infection. Bacteria can enter the urinary tract through the urethra and cause a urinary tract infection (UTI). A urine sample is placed on an agar medium that encourages the development of bacteria. The culture is considered as negative if there is no bacterial growth.
The urine culture is considered negative if bacterial growth is less than 10,000 colonies/ml (cfu/ml) if it is 10,000 to 100,000 cfu/ml it is intermediate, but if it exceeds 100,000 cfu/ml, it indicates that Urine Infection is rampant and remedial treatment is required.