Related Experiment Video
Updated: May 30, 2025

08:53
Recurrent Escherichia coli Urinary Tract Infection Triggered by Gardnerella vaginalis Bladder Exposure in Mice
Published on: December 4, 2020
5.9K
Should Low-Risk Pregnant Patients be Screened for Asymptomatic Bacteriuria?
Prachi Ray1, Kellie E Murphy2,3, Vanessa G Allen4,5,6
1Division of General Internal Medicine, Sinai Health System, Toronto.
NEJM Evidence
|January 28, 2025
Summary
Screening for asymptomatic bacteriuria is usually not advised. However, this review examines evidence and proposes a trial on screening low-risk pregnant individuals for this condition.
Area of Science:
- Obstetrics and Gynecology
- Infectious Diseases
- Clinical Trials
Background:
- Asymptomatic bacteriuria (ASB) is the presence of bacteria in urine without symptoms.
- Routine screening and treatment for ASB are generally not recommended due to limited benefits and potential harms.
- Pregnancy is a recognized exception where ASB screening is standard practice.
Purpose of the Study:
- To review the existing evidence regarding the screening and treatment of asymptomatic bacteriuria.
- To propose a clinical trial addressing the specific question of whether low-risk pregnant patients should be screened for ASB.
- To evaluate the clinical utility and potential impact of ASB screening in a low-risk obstetric population.
Main Methods:
- Literature review of current guidelines and research on ASB screening and treatment.
- Analysis of the benefits and risks associated with ASB in pregnant populations.
- Proposal of a prospective clinical trial design for low-risk pregnant patients.
Main Results:
- General consensus against ASB screening in non-pregnant individuals due to lack of proven benefit and risk of harm.
- Established recommendation for ASB screening in all pregnant women.
- Identification of a knowledge gap regarding the necessity of ASB screening in *low-risk* pregnant populations.
Conclusions:
- The current evidence supports ASB screening in pregnancy but requires further investigation for specific low-risk subgroups.
- A well-designed trial is needed to determine the optimal screening strategy for asymptomatic bacteriuria in low-risk pregnant patients.
- Future research should focus on refining screening protocols to maximize benefits and minimize harms in obstetric care.

