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Asymptomatic bacteriuria screening during pregnancy (urine culture)

Pregnancy

Pregnancy (early pregnancy)Typically once early in pregnancy (practice varies)5 minutes

A urine culture early in pregnancy can detect silent bacteria that increase the risk of kidney infection and pregnancy complications.

Guidance for your location

Location
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Recommended Age
Pregnancy (early pregnancy)
Frequency
Typically once early in pregnancy (practice varies)
Duration
5 minutes

Overview

Asymptomatic bacteriuria means bacteria are present in the urine without typical UTI symptoms. In pregnancy, untreated asymptomatic bacteriuria can increase the risk of kidney infection (pyelonephritis) and other complications. Screening is typically done with a urine culture early in pregnancy because dipstick tests are not reliable enough for screening. If the culture is positive, treatment is recommended and follow-up testing may be done.

Who Should Get This Screening

  • Pregnant people, typically screened early in pregnancy (timing varies by clinic).
  • People with urinary symptoms should be tested diagnostically regardless of screening schedules.

What to Expect

You provide a urine sample (usually a clean-catch midstream sample). The lab cultures the urine to check for bacterial growth. If positive, your clinician discusses treatment and follow-up.

How to Prepare

Follow these tips to prepare for your screening

  • Follow collection instructions carefully to reduce contamination.
  • Tell your clinician if you have UTI symptoms or have taken antibiotics recently.

Benefits

  • Reduces risk of kidney infection during pregnancy when detected and treated.
  • Supports safer pregnancy outcomes by preventing avoidable complications.

Things to Consider

  • Contamination can cause false positives and lead to repeat testing.
  • Treatment involves antibiotics, which can have side effects; choice is tailored for pregnancy safety.

Guideline Source: USPSTF asymptomatic bacteriuria screening in pregnancy (see Guidance for your location section above)

This information is provided for educational purposes only and should not replace professional medical advice. Always consult with your healthcare provider for personalized recommendations.