Asymptomatic Bacteriuria: Causes, Symptoms, and Treatment
Medically reviewed by Achuta Uppu, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Asymptomatic Bacteriuria?
A primary care doctor usually handles urine test results and decides if treatment is needed. For hard cases, a urologist, a doctor who treats the urinary tract, may be involved. An infectious disease doctor, a doctor who treats infections, may also help. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is asymptomatic bacteriuria?
Asymptomatic bacteriuria means bacteria are in your urine. You have no symptoms of a urinary tract infection (UTI). Normally, urine is sterile. That means no bacteria grow in it. This condition often shows up during routine urine tests. It usually does not need treatment.
Symptoms
There are no symptoms. That is what makes this condition different from a UTI. If you have burning when you urinate, a strong need to urinate, or going much more often, you may have a UTI. You would not have asymptomatic bacteriuria.
Causes and who gets it
Asymptomatic bacteriuria happens in a small number of healthy people. It affects women more often than men. Doctors do not fully understand why it causes no symptoms. You are more likely to have it in a few situations. You have a urinary catheter in place. You are pregnant. You are an older adult. You are a woman with long-term diabetes. Or you recently had surgery on the urinary tract.
How doctors diagnose it
Diagnosis needs a urine culture. This lab test lets bacteria grow so they can be counted. Most people with no urinary symptoms do not need this test. Screening is done for pregnant women, usually at the first prenatal visit. It is also done before surgery on the bladder or other parts of the urinary tract. To make the diagnosis, the culture must show a large growth of bacteria. In men, one culture is enough. In women, two separate cultures must show bacteria.
Treatment
Most people with bacteria in their urine but no symptoms do not need treatment. The bacteria are not causing harm. Treating may make future infections harder to treat. Antibiotics also have risks. These include changes in the body's natural germs and antibiotic resistance. Treatment with antibiotics may be needed in a few cases. You are pregnant. You recently had a kidney transplant. You are scheduled for surgery on the prostate or bladder. You have kidney stones that caused an infection. Or your young child has reflux. That means urine flows backward toward the kidneys.
When to see a doctor
Contact a doctor if you have trouble emptying your bladder, fever, flank or back pain, or pain with urination. These can be signs of a bladder or kidney infection. It needs to be checked and treated right away.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either can review your urine test results. They can order a urine culture if needed and refer you to a urologist when there is a problem in the urinary tract. They also handle follow-up testing and treatment decisions.
Common questions
Is asymptomatic bacteriuria a UTI?
No. A UTI causes symptoms such as burning, urgency, or pain. Asymptomatic bacteriuria means bacteria are in the urine with no symptoms at all.
Who should be screened for it?
Pregnant women are screened with a urine culture. It is usually done at the first prenatal visit. Screening is also done before surgery on the bladder or urinary tract. Experts do not recommend routine screening for nonpregnant adults.
Why is it usually not treated?
The bacteria are not causing harm. Antibiotics do not help here. They can even make future infections harder to treat. They can also raise the risk of antibiotic resistance.
When is treatment needed?
Treating it in pregnancy helps prevent problems. These include kidney infection, low birth weight, and preterm birth. Treatment may also be needed if you recently had a kidney transplant. It may also be needed before prostate or bladder surgery. Or with kidney stones that caused an infection.
Sources
- MedlinePlus Medical Encyclopedia - Asymptomatic bacteriuria
- American Family Physician - Screening for Asymptomatic Bacteriuria in Adults
- CDC - Clinical Overview of Urinary Tract Infections
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
