Antibiotics for asymptomatic bacteriuria in pregnancy

Area of Science:

• Obstetrics and Gynecology
• Infectious Diseases
• Neonatal Health

Background:

• Untreated asymptomatic bacteriuria in pregnant individuals can lead to acute pyelonephritis in up to 30% of cases.
• Asymptomatic bacteriuria may be linked to preterm birth or serve as an indicator of socioeconomic factors contributing to low birth weight.

Purpose of the Study:

• To evaluate the impact of antibiotic therapy for asymptomatic bacteriuria on persistent bacteriuria during pregnancy.
• To assess the effect of antibiotic treatment on the risk of preterm delivery and postpartum pyelonephritis.

Main Methods:

• A systematic review of randomized controlled trials was conducted.
• Included trials compared antibiotic treatment versus placebo or no treatment for pregnant women with screened asymptomatic bacteriuria.
• Quality assessment of included trials was performed.

Main Results:

• Thirteen studies of variable quality were analyzed.
• Antibiotic treatment significantly eradicated asymptomatic bacteriuria compared to control groups (OR 0.07, 95% CI 0.05-0.10).
• A notable reduction in pyelonephritis incidence (OR 0.25, 95% CI 0.19-0.32) and preterm delivery/low birth weight (OR 0.60, 95% CI 0.45-0.80) was observed.

Conclusions:

• Antibiotic treatment is effective in decreasing pyelonephritis risk during pregnancy.
• The observed reduction in preterm delivery warrants further investigation but aligns with theories on infection's role in preterm birth.