Urinary tract infections are usually easy to treat with antibiotics, but sometimes serious complications can occur, including kidney damage or spread of the infection through the bloodstream. Urinary tract infections in pregnant women can lead to problems for both the mother and the fetus. Because UTIs can be uncomfortable, have serious health effects, and are easy to treat, it might make sense to test for bacteriuria even if patients have no symptoms. This would allow physicians to treat patients with antibiotics before symptoms or complications happen. Looking for a disease in people with no symptoms is called screening. To test for bacteriuria, a sample of urine is collected and sent to the laboratory.