Asymptomatic bacteruiria is the presence of bacteria in the urine, without any symptoms.
Urine is usually free of bacteria. But sometimes a person's own bacteria can enter the urethra, the tube that carries urine from the bladder to the outside of the body. From the urethra, bacteria move into the bladder and infect the urine. A small number of bacteria in the urine often produces no symptoms and is called asymptomatic bacteriuria. A large amount of bacteria in the urine often causes symptoms and is called a urinary tract infection (UTI).
Bacteriuria can be caused by many conditions, including:
Bacteriuria is more common in women than men, however the frequency increases with age for both sexes.