Examination of the Efficacy of Preventive Antibiotic Treatment During the Puerperium Among Pregnant Women With Recurrent Urinary Tract Infections

Overview

Urinary tract infection is the most common bacterial infection during pregnancy. Asymptomatic bacteriuria is the most common infection, in up to 8% of the population. Symptomatic infection may cause cystitis or cause pyelonephritis.

Among pregnant women with recurrent bacteriuria, preventive antibiotic treatment has been found to be efficacious in reducing the bacteriuria rate and the complications.

the changes of the urinary tract which appear during pregnancy usually resolve up to 3 months post-partum.

The purpose of this study is to examine the efficacy of preventive antibiotic treatment during the puerperium.

Full Title of Study: “The Efficacy of Preventive Antibiotic Treatment During the Puerperium Among Pregnant Women With Recurrent Urinary Tract Infections”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: None (Open Label)
  • Study Primary Completion Date: July 1, 2014

Detailed Description

During pregnancy functional modifications in the urinary tract influence the function of the urinary tract system. Those changes raise the risk of urinary tract infections. The most common bacterial infections during pregnancy are urinary tract infections. Actually, asymptomatic bacteriuria is the most common infection in up to 8% of the population. Symptomatic infection may cause cystitis or include the renal calyces and parenchyma and cause pyelonephritis. There are few common protocols for bacteriuria treatment. The recurrence rate after treatment is 30%. Preventive treatment with nitrofurantoin has been demonstrated to be effective, although there is a small risk to acute respiratory distress which resolved with cessation of the treatment. Renal infection is the most common serious infection during pregnancy. Complication of renal infection can lead to ARDS or urosepsis. Renal infection usually develops during the second trimester and has been related to prim parity and young women.

About 20% of women will deteriorate to renal insufficiency. 30-40% of cases will be followed with recurrent bacteriuria later on, for this reason, a preventive treatment is recommended until delivery. In previous studies the preventive treatment reduced the bacteriuria rate from 38% to 8%.

After delivery, the morphological changes including edema, bladder hyperemia and a raise in the urinary volume, pass away up to 3 months post partum. There is only slight information regarding the rate of bacteriuria during puerperium, most of the information relates to the early puerperium period. In addition, the consequences of such infection are unknown.

The aim of this study is to estimate the efficacy of preventive antibiotic treatment during the puerperium.

Objectives

1. To estimate the rate of bacteriuria and other urinary tract infections during the puerperium among women that had recurrent UTIs or pyelonephritis during pregnancy

2. To evaluate the efficacy of preventive treatment during the puerperium Hypothesis: The pregnancy modifications which cause more urinary tract infections during pregnancy, exist also during the puerperium, and can cause complications Study design Prospective, randomized, open label Study population: Pregnant women with two or more episodes of bacteriuria or one episode of pyelonephritis.

Study period From after delivery to 6 weeks after delivery The study size has been determined according to a reduction in the bacteriuria rate following preventive treatment from 38% to 8%. Basing on that fact, each group has to include 37 women, to get a 80% power with α=0.05.

Study protocol: women will be randomized at recruitment. Demographic and obstetrical data will be collected. The women in the treatment group will receive a prophylactic treatment after delivery for 6 weeks. If the woman breastfeeds, the treatment will be fitted to the situation. Urine culture will be collected in the morning following recruitment, 3 and 6 weeks post delivery. Details regarding bacteriuria, urinary tract infections, pyelonephritis and admissions for related complications will be collected.

The study was approved by the local Helsinki committee.

Interventions

  • Drug: Preventive antibiotic treatment- NITROFURANTOIN
    • P.O NITROFURANTOIN 100 mg per day for 6 weeks
  • Drug: Preventive antibiotic treatment- CEPHALEXIN
    • P.O CEPHALEXIN 500 MG PER DAY FOR 6 WEEKS
  • Drug: PREVENTIVE TREATMENT- AMOXICILLIN
    • P.O AMOXICILLIN 250 MG PER DAY FOR 6 WEEKS
  • Drug: PREVENTIVE TREATMENT- AMOXICILLIN AND CLAVULANATE POTASSIUM
    • P.O AMOXICILLIN AND CLAVULANATE POTASSIUM, 875 MG PER DAY FOR 6 WEEKS
  • Drug: PREVENTIVE TREATMENT- CEFUROXIME
    • P.O CEFUROXIME 250 MG PER DAY FOR 6 WEEKS
  • Drug: PREVENTIVE TREATMENT SULFAMETHOXAZOLE AND TRIMETHOPRIM
    • P.O SULFAMETHOXAZOLE AND TRIMETHOPRIM 1 TAB PER DAY FOR 6 WEEKS

Arms, Groups and Cohorts

  • No Intervention: control arm
    • The women in this arm will not receive preventive antibiotic treatment after delivery
  • Active Comparator: preventive antibiotic treatment
    • The women in this arm will receive preventive antibiotic treatment after the delivery to 6 weeks

Clinical Trial Outcome Measures

Primary Measures

  • Urinary tract complications
    • Time Frame: 6 weeks

Participating in This Clinical Trial

Inclusion Criteria

  • Pregnant women with two or more episodes of bacteriuria or one episode of pyelonephritis during pregnancy.

Exclusion Criteria

  • Women with malformations of the urinary tract
  • women with risk factors to urinary tract infections, for example DIABETES MELLITUS, REFLUX.
  • Women with urinary tract infection caused by resistant bacteria (to conventional treatment)

Gender Eligibility: Female

Minimum Age: 18 Years

Maximum Age: 50 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • HaEmek Medical Center, Israel
  • Provider of Information About this Clinical Study
    • Sponsor

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